Pretentious say little right (4)
I believe the answer is:
arty
'pretentious' is the definition.
(similar in meaning)
'little right' is the wordplay.
I cannot really see how this works, but
'right' could be 'ar' (I've seen this in other clues) and 'ar' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'say' is the link.
Can you help me to learn more?
(Other definitions for arty that I've seen before include "Pretentiously creative" , "Dilettante" , "Making a point of appearing interested in painting, sculpture etc" , "Having affected interest in visual creativity" , "Affectedly artistic" .)