Again take up craft after break (7)
I believe the answer is:
restart
'again take up' is the definition.
('start' can be a synonym for 'take up' so perhaps 'restart' is OK for 'again take up')
'craft after break' is the wordplay.
'craft' becomes 'art' (I've seen this before).
'after' means one lot of letters go next to another.
'break' becomes 'rest' (resting is a kind of breaking).
'art' after 'rest' is 'RESTART'.
(Other definitions for restart that I've seen before include "begin afresh" , "Jumping the gun will mean" , "Resume" , "Commence again" , "launch again" .)