Spaniard, no longer with Man U, quits team (6)
I believe the answer is:
eleven
'team' is the definition.
(eleven is a kind of team)
'spaniard no longer with man u quits' is the wordplay.
I cannot quite see how this works, but
'no' could be 'n' (common abbreviation) and 'n' is found in the answer.
'man' could be 'lev' and 'lev' is located in the answer.
The remaining letters 'ee' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for eleven that I've seen before include "Time for the mid-morning tea break?" , "Time for morning coffee" , "Smallest positive three-syllable integer" , "Cricketing side" , "Cardinal" .)