The Greek for 'painter' (2,5)

I believe the answer is:
el greco
'painter' is the definition.
(nickname of Domenikos Theotokpoulos, 1541-1641)
'the greek' is the wordplay.
I cannot quite see how this works, but
'greek' could be 'gr' (abbreviation for Greek) and 'gr' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for el greco that I've seen before include "Spanish painter, nicknamed for his place of birth" , "Domenikos Theotokopoulos" , "Sixteenth to seventeenth century Greek-born Spanish painter" , "Spanish painter born 1541 in Crete" , "Famous painter's nickname" .)
