Football team, one welcoming new scorer (8)
I believe the answer is:
albinoni
'scorer' is the definition.
(Italian composer Tomaso Albinoni)
'football team one welcoming new' is the wordplay.
'football team' becomes 'albino' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' becomes 'i' (Roman numeral).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'albino'+'i'='albinoi'
'albinoi' enclosing 'n' is 'ALBINONI'.
Can you help me to learn more?
(Other definitions for albinoni that I've seen before include "Italian composer; non-alibi (anagram)" , "he made notes" , "Tomaso --, Italian Baroque composer" , "Italian composer to whom a well-known adagio was attributed" , "Italian baroque composer whose famous 'Adagio' was finished by another" .)