United absorbed by plan — it's working for the match (7)
I believe the answer is:
nuptial
'the match' is the definition.
(thesaurus)
'united absorbed by plan it's working' is the wordplay.
'united' becomes 'u' (as in Man U, Manchester United).
'absorbed by' indicates putting letters inside.
'working' indicates an anagram.
'plan'+'it'='planit'
'planit' anagrammed gives 'nptial'.
'u' inserted inside 'nptial' is 'NUPTIAL'.
'for' acts as a link.
(Other definitions for nuptial that I've seen before include "Like wedding ceremony" , "Until pa (anag.)" , "Relating to weddings" , "Relating to matrimony" , "To do with marriage or a wedding ceremony" .)