Spring celebration, Scottish one featuring in weekly, perhaps (6)

I believe the answer is:

maying

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'weekly perhaps' is the definition.
I can't judge whether this defines the answer.

'spring celebration scottish one featuring in' is the wordplay.
'spring' becomes 'may' (I've seen this before).
'celebration scottish' becomes 'g' (I can't justify this - if you can you should give a lot more credence to this answer).
'one featuring' is an insertion indicator.
'may'+'g'='mayg'
'mayg' placed around 'in' is 'MAYING'.

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I've seen this clue in The Times.

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