Crossword Genius

Tramp crossing wooded hollow, initially identifying gumtree (8)

Ross

I believe the answer is:

bdellium

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'gumtree' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I don't see?

'tramp crossing wooded hollow initially identifying' is the wordplay.
'tramp' becomes 'bum' (both can mean a homeless person).
'crossing' is an insertion indicator (to cross can mean to go over or around).
'wooded hollow' becomes 'dell' (I've seen this in another clue).
'initially' indicates taking the first letters.
The initial letter of 'identifying' is 'i'.
'dell'+'i'='delli'
'bum' enclosing 'delli' is 'BDELLIUM'.

Can you help me to learn more?

I've seen this clue in The Times.
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