Football official reader found in the Mirror? (9)
I believe the answer is:
reflector
'the mirror?' is the definition.
(mirror is a kind of reflector)
'football official reader' is the wordplay.
'football official' becomes 'ref' (short for referee).
'reader' becomes 'lector' (synonyms).
'ref'+'lector'='REFLECTOR'
'found in' is the link.
(Other definitions for reflector that I've seen before include "Eg, cat's eye" , "I think" , "One thinking" , "telescope" , "Mirror or similar object" .)