Leaves home where they were once nuts for a collection of trees (3,6)
I believe the answer is:
oak forest
'leaves home where they were once nuts' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'a collection of trees' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
'collection' could be 'forest' (forest is a kind of collection) and 'forest' is located in the answer.
'of' could be 'o' and 'o' is present in the answer.
A single letter 'k' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?