Time to relax, kid! (5)
I believe the answer is:
tease
'kid' is the definition.
(I've seen this in other clues)
'time to relax' is the wordplay.
'time' becomes 't'.
'to relax' becomes 'ease' (I've seen this before).
't'+'ease'='TEASE'
(Other definitions for tease that I've seen before include "Kid" , "Josh" , "Vex" , "Use a comb" , "Gently mock" .)