Force Frenchman to move pile round (5)
I believe the answer is:
impel
'force' is the definition.
(I know that force can be written as impel)
'frenchman to move pile round' is the wordplay.
'frenchman' becomes 'm' (abbreviation for Monsieur).
'to move' indicates an anagram (I've seen 'moving' mean this).
'round' is an insertion indicator.
'pile' anagrammed gives 'ipel'.
'm' placed inside 'ipel' is 'IMPEL'.
(Other definitions for impel that I've seen before include "Press on - drive forward" , "Constrain" , "Drive or coerce" , "Urge forward, drive" , "Spur on" .)