Laze around with enthusiasm! (4)
I believe the answer is:
zeal
'laze around with enthusiasm' is the definition.
(I've seen this before)
'laze around' is the wordplay.
'around' indicates anagramming the letters.
'laze' with letters rearranged gives 'ZEAL'.
(Other definitions for zeal that I've seen before include "6 [ENTHUSIASM]" , "Laze (anag.)" , "Great enthusiasm or keenness" , "Verve" , "Dedicated enthusiasm" .)