Love is cutting single benefit (7)
I believe the answer is:
idolise
'love' is the definition.
(I know that idolise is a more specific form of the action adore)
'is cutting single benefit' is the wordplay.
'cutting' indicates putting letters inside (some letters cut their way into a word).
'single' becomes 'I' (one).
'benefit' becomes 'dole' (informal term for a state benefits).
'i'+'dole'='idole'
'is' placed inside 'idole' is 'IDOLISE'.
(Other definitions for idolise that I've seen before include "Revere, love greatly" , "Make into a figure of worship" , "Doilies to worship" , "Worship and adore" , "Worship extravagantly" .)