Newcomers in clothing of Stockport FC (9)
I believe the answer is:
strangers
'newcomers' is the definition.
(stranger can mean a new arrival)
'clothing of stockport fc' is the wordplay.
'clothing of' says to hollow out the word (remove centre letters) (only the letters which 'clothe' the word remain).
'fc' becomes 'Rangers' (Rangers Football Club).
'stockport' with its centre removed is 'st'.
'st'+'rangers'='STRANGERS'
'in' is the link.
(Other definitions for strangers that I've seen before include "Foreigners" , "Aliens" , "Those we have not met" , "Outsiders" , "People one doesn't know" .)