Second-row Savelio made the allegation in an incident that was put on report in the 35th minute as FC lost 16-14 at the DW Stadium.
Referee James Child brought the captains together and, on television footage, Savelio cited Clubb who was not on the pitch at the time.
Hull coach Brett Hodgson said: “He (Savelio) is not good; he’s pretty upset.
“I don’t want to speculate on what was said; we need to work out exactly what happened and see what progresses.”
Savelio later posted a message on social media in which - without naming Clubb - he claimed he was called a "stupid Polynesian c***."
Former England prop Clubb did not return to the field but Wigan coach Adrian Lam said the allegation was not the reason.
Lam said: “I’ve come down from the gantry and got the news from down below.
“I have no comment at the moment until we get to the bottom of what the allegation is.
“As a club we’ll follow protocols and see how it unfolds over the next 24 hours.
“It’s always a concern regardless of what club or what player.
“It’s a hard one to comment on until I know what’s actually been said or what the allegation is.
“We will make sure when it’s brought up that we take it head on.”
On the game, Hodgson believed the better side won.
He added: “We knew it would be a tough game and it was.
“We lacked clinical finish to our sets.
“Our effort was there but we were lacking a bit of a finish and we made it too hard for ourselves.”
Hodgson, who lost for the first time as Hull coach, was unsure about a first half yellow card for Jake Connor’s high tackle on Zak Hardaker.
“I need to get clarification if anyone gets hit high is it an automatic ten in the bin?” said the Australian.
“He did hit high but I don’t know if it warranted ten minutes.”
Hull prop Scott Taylor had to be helped off injured in the first period and Hodgson said: “I’m not sure the extent of that at the moment, but it doesn’t look good.”
Kiwi centre Carlos Tuimavave could also be doubtful for next Saturday’s re-match with Wigan in the Challenge Cup having departed in the second period with a head knock.