Sheffield United handed timely lift ahead of visit from Charlton Athletic
Lavery suffered a hamstring twinge in the 4-2 midweek win at Swindon - when he found the net for the fourth time this term - while Duffy has sat out the Blades’ last two games with a knee problem sustained in the 3-3 draw at Rochdale.
Clarke recently spent some time in rehabilitation at St George’s Park following a persistent ankle injury.
Meanwhile, the Blades chief has confirmed that Stefan Scougall, Marc McNulty and James Wilson will play in a private game next weekend to step up their road back to full match fitness.
Wilder said: “Lavs and Duff are both available and they have both trained today.
“We are fit and healthy and, at this stage, that is all I can ask for. You are always going to get impact injuries.
“But going into the last nine games, we look in decent shape
“Leon is back in full training. Sometimes it’s good to get away, different surroundings and fresh ideas can help. He has come back and he is looking bright.”