Match fabric odd person appears in (10)
I believe the answer is:
correspond
'match' is the definition.
('correspond' can be a synonym of 'match')
'fabric odd person appears in' is the wordplay.
'fabric' becomes 'cord' (cord is a kind of fabric**).
'odd' is an anagram indicator.
'appears in' means one lot of letters goes inside another.
'person' anagrammed gives 'respon'.
'cord' enclosing 'respon' is 'CORRESPOND'.
(Other definitions for correspond that I've seen before include "Exchange letters" , "Write - match" , "Keep in touch by letter" , "Swap letters" , "email, say?" .)