The team in the Spanish uniform (6)
I believe the answer is:
eleven
'the team' is the definition.
(eleven is a kind of team)
'the spanish uniform' is the wordplay.
'the spanish' becomes 'el' ('the' in Spanish).
'uniform' becomes 'even' (uniform can mean even or level).
'el'+'even'='ELEVEN'
'in' acts as a link.
(Other definitions for eleven that I've seen before include "Smallest positive three-syllable integer" , "Not first team (6,6) - See 24" , "Football team; number" , "1 and 1?" , "Cricketing side" .)