Footballer seizing attention is tiresome (7)
I believe the answer is:
wearing
'tiresome' is the definition.
(thesaurus)
'footballer seizing attention' is the wordplay.
'footballer' becomes 'wing' (I've seen this in other clues).
'seizing' is an insertion indicator.
'attention' becomes 'ear' (ear is a kind of attention).
'wing' placed around 'ear' is 'WEARING'.
'is' acts as a link.
(Other definitions for wearing that I've seen before include "Trying" , "sporting" , "Irksome" .)