Crossword Genius

An eccentric minority are busily cleaning fruit (7,6)

Ross

I believe the answer is:

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

'an eccentric minority' is the definition.
(I've seen this before)

'busily cleaning fruit' is the wordplay.
'cleaning fruit' can be anagrammed to 'LUNATIC FRINGE'.
Though, I am unsure how the anagram is indicated.

'are' acts as a link.

Can you help me to learn more?

(Other definitions for lunatic fringe that I've seen before include "Group of political party extremists", "fruitcakes around the edge?", "Most extreme members of an organisation", "Political fanatics", "Extreme political element".)

I've seen this clue in Sydney Morning Herald.