Volte-face of moderates creating fuss (4)
I believe the answer is:
stew
'fuss' is the definition.
(I've seen this in another clue)
'volte-face of moderates' is the wordplay.
'volte-face of' says the letters should be written in reverse.
'moderates' becomes 'wets' (political term).
'wets' backwards is 'STEW'.
'creating' acts as a link.
(Other definitions for stew that I've seen before include "Simmer" , "what might be for dinner?" , "Fret" , "Braise" , "Ragout or burgoo" .)