Spare English newspaper collected by boyfriend perhaps (8)
I believe the answer is:
leftover
'spare' is the definition.
(thesaurus)
'english newspaper collected by boyfriend perhaps' is the wordplay.
'english' becomes 'E' (abbreviation).
'newspaper' becomes 'FT' (Financial Times newspaper).
'collected by' indicates putting letters inside.
'boyfriend perhaps' becomes 'lover' (boyfriend is a kind of lover).
'e'+'ft'='eft'
'eft' placed within 'lover' is 'LEFTOVER'.
(Other definitions for leftover that I've seen before include "Remnant" , "Finally unused" , "Remaining" , "What remains" , "something you'd keep on the plate!" .)