Regular returned collecting right bottle (5)
I believe the answer is:
nerve
'bottle' is the definition.
(both can mean courage)
'regular returned collecting right' is the wordplay.
'regular' becomes 'even' (similar in meaning).
'returned' is a reversal indicator.
'collecting' is an insertion indicator.
'right' becomes 'r' (abbreviation).
'even' reversed gives 'neve'.
'neve' placed around 'r' is 'NERVE'.
(Other definitions for nerve that I've seen before include "Strand of body tissue" , "Courage - or effrontery" , "Dangerous type of gas" , "Coolness under fire" , "Bodily fibre carrying sensation" .)