Crossword Genius

Regarding a bit of money for a gin cocktail (5)

Ross

I believe the answer is:

eying

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

'regarding a bit of money' is the definition.
The answer and definition can be both to do with perception as well as being present participle verbs.
Maybe you can see a link between them that I can't see?

'gin cocktail' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'gin' is 'ing' which is located in the answer.
This explanation may well be incorrect...

'for a' is the link.

Can you help me to learn more?

(Other definitions for eying that I've seen before include "Looking at with interest" , "Watching closely" , "Looking at closely" , "Ogling," , "In the process of close scrutiny" .)

I've seen this clue in the Evening Standard.
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