A row about the Spanish artist's studio (7)
I believe the answer is:
atelier
'artist's studio' is the definition.
(I've seen this in another clue)
'a row about the spanish' is the wordplay.
'row' becomes 'tier' (a tier is a row of things).
'about' is an insertion indicator.
'the spanish' becomes 'el' ('the' in Spanish).
'tier' placed around 'el' is 'telier'.
'a'+'telier'='ATELIER'
(Other definitions for atelier that I've seen before include "Designer's workshop" , "Artist's studio (French)" , "Tie earl up in the artist's place" , "Artist's workshop, studio" , "Artist's workroom" .)