Revolutionary shoe is too tight to accommodate foot (7)
I believe the answer is:
tootsie
'foot' is the definition.
(I've seen this before)
'revolutionary shoe is too tight to accommodate' is the wordplay.
'revolutionary' is a reversal indicator.
'to accommodate' says the answer is hidden in the clue (I've seen 'accommodates' mean this).
'eistoot' is hidden within 'shoe is too tight'.
'eistoot' in reverse letter order is 'TOOTSIE'.
(Other definitions for tootsie that I've seen before include "pretty girl" , "Foot or toe (childish)" , "Foot (jocular)" , "digit" , "Funnily enough, foot" .)