Managing to turn pub into bar (7)
I believe the answer is:
running
'managing' is the definition.
(running is a kind of managing)
'turn pub into bar' is the wordplay.
'turn' says the letters should be written in reverse.
'pub' becomes 'inn' (I've seen this before).
'into' means one lot of letters goes inside another.
'bar' becomes 'rung' ().
'inn' reversed gives 'nni'.
'nni' inserted inside 'rung' is 'RUNNING'.
'to' acts as a link.
(Other definitions for running that I've seen before include "Management" , "Jogging" , "Directing" , "healthy activity?" , "No chance if you're out of it" .)