Trapped right in the melee, to one's alarm (6)

I believe the answer is:

fright

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'one's alarm' is the definition.
'fright' can be an answer for 'alarm' (both can mean fear or worry). I'm not sure about the 'one's' bit.

'trapped right in the melee' is the wordplay.
'trapped right' becomes 'r' (common abbreviation. I am not sure about the 'trapped' bit.).
'in the' is an insertion indicator.
'melee' becomes 'fight' (I've seen this in another clue).
'r' inserted within 'fight' is 'FRIGHT'.

'to' is the link.

Can you help me to learn more?

(Other definitions for fright that I've seen before include "Grotesque" , "Panic" , "Shock, sudden alarm" , "Sudden exposure to fear" , "Terror" .)

I've seen this clue in the Evening Standard.

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