A row about the Spanish studio (7)
I believe the answer is:
atelier
'studio' is the definition.
(atelier is a kind of studio)
'a row about the spanish' is the wordplay.
'row' becomes 'tier' (a tier is a row of things).
'about' means one lot of letters goes inside another.
'the spanish' becomes 'el' ('the' in Spanish).
'tier' going around 'el' is 'telier'.
'a'+'telier'='ATELIER'
(Other definitions for atelier that I've seen before include "Artist's workshop, studio" , "I relate to workshop used by artist" , "Designer's workshop" , "Artist's studio (French)" , "room for artist" .)