Left coal production in pub (5)
I believe the answer is:
local
'pub' is the definition.
(one's local pub)
'left coal production in' is the wordplay.
'left' becomes 'l' (common abbreviation).
'production' is an anagram indicator.
'in' indicates putting letters inside.
'coal' with letters rearranged gives 'ocal'.
'l' inserted into 'ocal' is 'LOCAL'.
(Other definitions for local that I've seen before include "Parish pump" , "(Pub) of the district" , "nearest boozer!" , "Nieghbourhood pub or its customer" , "Nearby pub" .)