Guys taking in the Spanish dupes (7)
I believe the answer is:
deludes
'dupes' is the definition.
(dupe can mean to trick or delude)
'guys taking in the spanish' is the wordplay.
'guys' becomes 'dudes' (I've seen this in another clue).
'taking in' is an insertion indicator.
'the spanish' becomes 'el' ('the' in Spanish).
'dudes' placed around 'el' is 'DELUDES'.
(Other definitions for deludes that I've seen before include "Fools" , "dupes" , "Deceives (as to truth)" , "Tricks" .)