Crossword Genius

Pretentious group of people lacking power (4)

Ross

I believe the answer is:

arty

I'm a little stuck... Click here to teach me more about this clue!

'pretentious' is the definition.
(similar in meaning)

'group of people lacking power' is the wordplay.
I cannot quite see how this works, but
'power' could be 'art' (art is a kind of power) and 'art' is found within the answer.
A single letter 'y' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for arty that I've seen before include "Aesthetically pretentious" , "Having pretensions about paintings, music, etc" , "Pretentiously cultural" , "pretentiously cultivated" , "Trendily into painting" .)

I've seen this clue in The Independent.
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