Laid back, office siesta criticised (6)
I believe the answer is:
panned
'criticised' is the definition.
(I've seen this in another clue)
'laid back office siesta' is the wordplay.
'laid back' shows that the letters should be reversed in order.
'office' becomes 'den' (I've seen this before).
'siesta' becomes 'nap' (I've seen this before).
'den'+'nap'='dennap'
'dennap' back-to-front is 'PANNED'.
(Other definitions for panned that I've seen before include "Gave a bad review to" , "Washed earth for gold" , "Severely criticised (a play, etc)" , "Expressed a totally negative opinion, of a play say" , "Heavily criticised" .)