Trim craft form (9)
I believe the answer is:
shipshape
'trim' is the definition.
(synonyms)
'craft form' is the wordplay.
'craft' becomes 'ship' (ship is a kind of craft).
'form' becomes 'shape' (synonyms).
'ship'+'shape'='SHIPSHAPE'
(Other definitions for shipshape that I've seen before include "Neat and tidy" , "Nautically neat" , "Hash pipes may be in good order - like sailor?" , "Ordered" , "In good order, like well-dressed sailor?" .)