Resistance movement not fully crushed (11)

I believe the answer is:

underground

'resistance movement' is the definition.

'not fully crushed' is the wordplay.
'not fully' becomes 'under' (eg in undercooked).
'crushed' becomes 'ground' ('ground' can be a synonym of 'crushed').
'under'+'ground'='UNDERGROUND'

(Other definitions for underground that I've seen before include "Subterranean" , "In hiding" , "Transport system" , "Travel on this" , "Hidden away" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app