Crossword Genius

Anxious, one outside shelter with husband beset by birds (2,11)

Ross

I believe the answer is:

on tenterhooks

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

'anxious' is the definition.
(thesaurus)

'one outside shelter with husband beset by birds' is the wordplay.
I cannot really see how this works, but
'shelter' could be 'tent' (a tent is a kind of shelter) and 'tent' is found within the answer.
'husband' could be 'h' (abbreviation) and 'h' is found in the answer.
'birds' could be 'rooks' (rook is a kind of bird) and 'rooks' is located in the leftover letters.
The remaining letters 'one' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for on tenterhooks that I've seen before include "In impatient suspense" , "In agitated suspense" , "Keyed up in anticipation" , "In a state of suspense" , "Nervously expectant" .)

I've seen this clue in The Telegraph.
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