Unwind with curious zeal (4)
I believe the answer is:
laze
'unwind' is the definition.
(I've seen this in another clue)
'curious zeal' is the wordplay.
'curious' indicates anagramming the letters.
'zeal' anagrammed gives 'LAZE'.
'with' is the link.
(Other definitions for laze that I've seen before include "Are indolent" , "Lounge about" , "Lie idly about" , "don't do much" , "Relax" .)