The Leith side travel to Paisley to take on a resurgent St Mirren side while struggling themselves after just two wins in their last 11 games.
They will have to do without suspended midfielder Gary Deegan as well as Clancy, who is struggling with a hamstring strain.
Fenlon said of his injury situation: "Tim is still not ready yet and will be another week away I think. Everyone else trained today (Friday) so I think he will be the only one missing."
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- St Mirren