Ovation ends in procession for Queen (7)
I believe the answer is:
monarch
'queen' is the definition.
(I've seen this before)
'ovation ends in procession' is the wordplay.
'ends' means to remove the middle letters.
'in' means one lot of letters goes inside another.
'procession' becomes 'march' (march is a kind of procession).
'ovation' with its middle taken out is 'on'.
'on' going into 'march' is 'MONARCH'.
'for' is the link.
(Other definitions for monarch that I've seen before include "Not a subject" , "Butterfly (emperor, say?)" , "one over realm?" , "Sole hereditary ruler" , "Butterfly - ruler" .)