Gross dollop of Béarnaise (4)

I believe the answer is:

earn

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

'gross dollop' is the definition.
'earn' can be an answer for 'gross' (I've seen this in another clue). I'm not sure about the 'dollop' bit.

'of bearnaise' is the wordplay.
'of' indicates a hidden word.
'EARN' is hidden within 'bearnaise'.

Can you help me to learn more?

(Other definitions for earn that I've seen before include "Warrant" , "Acquire by ones' effort" , "Deserve - merit" , "Merit through work or endeavour" , "Gain by work or merit" .)

I've seen this clue in The Everyman puzzle in The Observer.

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