Bent, also breaking through (5)
I believe the answer is:
bandy
'bent' is the definition.
(bandy refers to bent or curved legs)
'also breaking through' is the wordplay.
'also' becomes 'and' (both can mean in addition).
'breaking' means one lot of letters goes inside another.
'through' becomes 'by'.
'and' put into 'by' is 'BANDY'.
(Other definitions for bandy that I've seen before include "Curved" , "Bow-legged" , "Bow (legged); swap (angry words)" , "Crooked" .)