They play soccer in the Spanish squares (7)
I believe the answer is:
elevens
'they play soccer' is the definition.
The definition suggests an adverb but the answer is not.
'the spanish squares' is the wordplay.
'the spanish' becomes 'el' ('the' in Spanish).
'squares' becomes 'evens' (I've seen this in another clue).
'el'+'evens'='ELEVENS'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for elevens that I've seen before include "Sports teams" , "Some sportsmen" , "11, 11" , "Eg, football teams" , "1A, 20 [SUNDERLAND LEEDS]" .)