Crossword Genius

Policeman grabbing one thug's head at fair is in a good place (7,6)

Ross

I believe the answer is:

sitting pretty

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

'policeman grabbing one thug's head' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'fair is in a good place' is the wordplay.
I cannot quite understand how this works, but
'fair' could be 'pretty' (I've seen this before) and 'pretty' is present in the answer.
'in' is present in the answer.
'good' could be 'g' (abbreviation) and 'g' is found in the answer.
'place' could be 'sit' (sitting is a kind of placing) and 'sit' is present in the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

'at' acts as a link.

Can you help me to learn more?

(Other definitions for sitting pretty that I've seen before include "Enjoying an advantageous position" , "In a good position (posing as a model?)" , "Well placed" , "Might supermodel be" , "advantageously positioned" .)

I've seen this clue in The Guardian.
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