Turn on again and relax with creative activity (7)
I believe the answer is:
restart
'turn on again' is the definition.
'relax with creative activity' is the wordplay.
'relax' becomes 'rest' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'creative activity' becomes 'art' (art is a kind of activity. I am not sure about the 'creative' bit.**).
'rest'+'art'='RESTART'
'and' is the link.
(Other definitions for restart that I've seen before include "Jumping the gun will mean" , "Commence again" , "launch again" , "Resume" , "begin afresh" .)