Clip a groom's head when held by his partner (7)
I believe the answer is:
abridge
'clip' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for abridge that I've seen before include "Shorten by using fewer words" , "Abbreviate, shorten" , "Condense, summarise" , "Shorten (eg, text)" , "Make shorter, book say" .)