Number getting the Spanish uniform (6)
I believe the answer is:
eleven
'number' is the definition.
(eleven is a kind of whole number)
'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'
'getting' is the link.
(Other definitions for eleven that I've seen before include "Lowest two-digit prime" , "XI as Roman numeral" , "Age to start secondary education" , "Football side" , "'Legs' bingo number" .)