Models drunk often? The opposite (6)

I believe the answer is:

seldom

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

'often? the opposite' is the definition.
I can't judge whether this definition defines the answer.

'models drunk' is the wordplay.
'drunk' indicates an anagram.
'models' is an anagram of 'SELDOM'.

Can you help me to learn more?

(Other definitions for seldom that I've seen before include "Models (anag)" , "Once in a blue moon" , "Only occasionally" , "Alluvium" , "Not often, infrequently" .)

I've seen this clue in The Sun.

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