Crossword Genius

Just what's needed if you feel short of a quid? (3)

Ross

I believe the answer is:

fee

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

'short of a quid?' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for fee that I've seen before include "Sum payable to professional person for services" , "(Entry) charge" , "price" , "Amount paid for job" , "Payment to a professional for services" .)

I've seen this clue in the Evening Standard.
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