Plenty of pilots (4)

I believe the answer is:

lots

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

'plenty' is the definition.
(I've seen this before)

'pilots' is the wordplay.
'LOTS' is hidden in amongst the letters.
However, I am not sure how the hidden word is indicated.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for lots that I've seen before include "Large number or amount" , "Oodles" , "Many - items in a sale" , "Large numbers at auction" , "a crowd?" .)

I've seen this clue in the Evening Standard.

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