Favour alternative over me? No resistance! (7)
I believe the answer is:
rosette
'favour' is the definition.
('favour' historically meant a token of affection)
'alternative over me? no resistance' is the wordplay.
'alternative' becomes 'or' (**).
'over' is a reversal indicator.
'me?' becomes 'setter' (the person that set this crossword).
'no' is a deletion indicator.
'resistance' becomes 'r' (abbreviation).
'or' back-to-front is 'ro'.
'setter' with 'r' removed is 'sette'.
'ro'+'sette'='ROSETTE'
(Other definitions for rosette that I've seen before include "Type of award" , "Ribbon in a cluster as an award" , "Party wear" , "Mark of affiliation" , "Arrangement of ribbons presented as a prize" .)