Any one of certain trees, possibly including pine (7)
I believe the answer is:
juniper
'any one' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'certain trees possibly including pine' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'pine' is 'nipe' which is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for juniper that I've seen before include "Shrub flavouring gin" , "Evergreen shrub or small tree with berry-like cones" , "kind of berries" , "Plant producing berries used to flavour gin" , "Shrub with berries used to flavour gin" .)