Forbearance of coppers coming round at intervals, initially (8)
I believe the answer is:
patience
'forbearance' is the definition.
('patience' can be a synonym of 'forbearance')
'coppers coming round at intervals initially' is the wordplay.
'coppers' becomes 'pence' (I've seen this before).
'coming round' is an insertion indicator.
'initially' indicates taking the first letters.
The first letter of 'intervals' is 'i'.
'at'+'i'='ati'
'pence' enclosing 'ati' is 'PATIENCE'.
'of' acts as a link.
(Other definitions for patience that I've seen before include "Card game - virtue" , "likely to be lost by the hot-tempered" , "that one plays" , "Card game played by one person" , "Game; forbearance" .)