Crossword Genius

One dwelling in grot possibly (4)

Ross

I believe the answer is:

trog

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'one dwelling' is the definition.
Although both the answer and 'dwelling' are verbs, they are not in the same form of the verb.

'grot possibly' is the wordplay.
'possibly' indicates anagramming the letters.
'grot' is an anagram of 'TROG'.

'in' acts as a link.

Can you help me to learn more?

(Another definition for trog that I've seen is " Trudge".)

I've seen this clue in The Independent.
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