Break from knitting a pullover (3)
I believe the answer is:
gap
'break' is the definition.
(a gap is a break in something)
'from knitting a pullover' is the wordplay.
'from' indicates a hidden word.
'GAP' is hidden within 'knitting a pullover'.
(Other definitions for gap that I've seen before include "Cleft" , "Narrow opening" , "Disparity" , "Aperture" , "Narrow space" .)