Put back in control, thanks primarily to our boss? (10)
I believe the answer is:
reinstated
'put back in' is the definition.
(to reinstate something is to bring it back)
'control thanks primarily to our boss?' is the wordplay.
'control' becomes 'reins' (take the reins).
'thanks' becomes 'ta' (UK informal version of 'thank you').
'primarily' says to take the initial letters.
'our boss?' becomes 'ed' (editor, the crossword setter's boss).
The initial letter of 'to' is 't'.
'reins'+'ta'+'t'+'ed'='REINSTATED'
(Other definitions for reinstated that I've seen before include "brought back" , "restored" , "Got back to work" , "being put back" .)