Crossword Genius

Polishing off treat in guesthouse, furtively (6)

Ross

I believe the answer is:

eating

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

'polishing off' is the definition.
(I've seen this in another clue)

'treat in guesthouse furtively' is the wordplay.
'EATING' is hidden within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for eating that I've seen before include "Putting away" , "Taking in solid food" , "Having supper?" , "Out to dinner?" , "Ingestion" .)

I've seen this clue in The Irish Times.
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