Close match, one’s rarely worn out (7)
I believe the answer is:
nightie
'one's rarely worn out' is the definition.
I can't judge whether this definition defines the answer.
'close match' is the wordplay.
'close' becomes 'nigh' (similar in meaning).
'match' becomes 'tie' (tie can mean a sporting fixture).
'nigh'+'tie'='NIGHTIE'
Can you help me to learn more?
(Other definitions for nightie that I've seen before include "What retiring lady assumes" , "put on at end of day?" , "one put on after dark" , "Bedtime wear" , "Does evening wear" .)