Short dating description: 'wearing thongs (not northern model)' (4)

I believe the answer is:

gsoh

'short dating description' is the definition.
(abbreviation for good sense of humour)

I don't understand the remainder of the clue.

(Other definitions for gsoh that I've seen before include "Good sense of humour" , "attractive attribute of potential partner?" , "What wit" , "found in personal ads!" .)

I've seen this clue in The Guardian.

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