Feeling remorseful, I step outside (5)

I believe the answer is:

ruing

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'feeling remorseful i step outside' is the definition.
'ruing' can be an answer for 'feeling' (ruing is a kind of feeling). I'm not certain of the 'remorseful i step outside' bit.

'i step outside' is the wordplay.
'step' becomes 'rung' (I've seen this before).
'outside' is an insertion indicator.
'i' going within 'rung' is 'RUING'.

Can you help me to learn more?

(Other definitions for ruing that I've seen before include "Bitterly regretting" , "Having second thoughts" , "Regretful" , "full of remorse?" , "feeling remorse" .)

I've seen this clue in the Evening Standard.

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