Resume painting to support others (7)
I believe the answer is:
restart
'resume' is the definition.
('restart' can be a synonym of 'resume')
'painting to support others' is the wordplay.
'painting' becomes 'art' (I've seen this before).
'to support' means one lot of letters go next to another (in a down clue, some letters hold others up).
'others' becomes 'rest' (I've seen this before).
'art' put after 'rest' is 'RESTART'.
(Other definitions for restart that I've seen before include "launch again" , "begin afresh" , "Resume" , "Jumping the gun will mean" , "Begin anew" .)