Crossword Genius

Partaking of, when forced to (6)

Ross

I believe the answer is:

having

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'partaking' is the definition.
The answer and definition can be both to do with ownership as well as being present participle verbs.
Maybe there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Another definition for having that I've seen is " Possessing, owning".)

I've seen this clue in the Evening Standard.
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