Oriel team resolved to improve (9)
I believe the answer is:
meliorate
'improve' is the definition.
('meliorate' can be a synonym of 'improve')
'oriel team resolved' is the wordplay.
'resolved' indicates an anagram.
'oriel'+'team'='orielteam'
'orielteam' with letters rearranged gives 'MELIORATE'.
'to' acts as a link.
(Another definition for meliorate that I've seen is " Improve".)
I've seen this clue in The Telegraph.
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