At work, no spare time to take off (11)
I believe the answer is:
impersonate
'take off' is the definition.
(I've seen this before)
'at work no spare time' is the wordplay.
'at work' indicates an anagram.
'no'+'spare'+'time'='nosparetime'
'nosparetime' is an anagram of 'IMPERSONATE'.
'to' is the link.
(Other definitions for impersonate that I've seen before include "Pretend to be (another person)" , "Assume the characteristics of another" , "Assume character of another - no spare time (anag)" , "Pinch identity of" , "Take off" .)