As idyllic and peaceful as any loch could be. (7)

I believe the answer is:

halcyon

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'as idyllic and peaceful' is the definition.
I can't tell whether this definition defines the answer.

'any loch could be' is the wordplay.
'could be' is an anagram indicator.
'any'+'loch'='anyloch'
'anyloch' is an anagram of 'HALCYON'.

'as' is the link.

Can you help me to learn more?

(Other definitions for halcyon that I've seen before include "Idyllically happy and peaceful" , "Happy, especially in the past" , "Serene" , "Bird" , "Idyllic" .)

I've seen this clue in The Irish Times.

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