The pointed part of a pine needle (3)

I believe the answer is:

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'a pine needle' is the definition.
'pin' can be an answer for 'needle' (both can mean a sharp point). I am not certain of the 'a pine' bit.

'the pointed part' is the wordplay.
'the pointed' becomes 'p' (this might be a standard abbreviation of which I'm unaware).
'part' becomes 'in part' (synonyms).
'p'+'in'='PIN'

'of' is the link.

Can you help me to learn more?

(Other definitions for pin that I've seen before include "Skittle; fix" , "Tack; fasten" , "form of identification" , "Debit-card number" , "Small object to fasten or attach" .)

I've seen this clue in the Evening Standard.

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