It's part of a dingle, naturally (4)

I believe the answer is:

glen

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'it's part' is the definition.
I can't tell whether this definition defines the answer.

'of a dingle naturally' is the wordplay.
'of' indicates the answer is hidden within the clue.
'GLEN' is hidden within 'dingle naturally'.

Can you help me to learn more?

(Other definitions for glen that I've seen before include "Narrow Scots valley" , "Campbell perhaps" , "Valley, dale" , "Narrow valley with a stream" , "Highland valley" .)

I've seen this clue in The Irish Independent.

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