Involved in impure boss's return to regain control (5,2)
I believe the answer is:
sober up
'regain control' is the definition.
I can't tell whether this definition defines the answer.
'involved in impure boss's return' is the wordplay.
'involved in' indicates the answer is hidden within the clue.
'return' shows that the letters should be reversed in order.
'purebos' can be found hidden inside 'impure bosss'.
'purebos' reversed gives 'SOBER UP'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for sober up that I've seen before include "become serious" , "What you do when drink wears off" , "Get real" , "Become less drunk" .)