Book about feeding birds, source unfamiliar (8,6)
I believe the answer is:
robinson crusoe
'book' is the definition.
(I've seen this before)
'about feeding birds source unfamiliar' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is present in the answer.
'birds' could be 'robins' (robin is a kind of bird) and 'robins' is found in the answer.
an anagram of 'source' is 'crusoe' which is within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for robinson crusoe that I've seen before include "Fictional castaway" , "CA [CHILDRENS ADVENTURE]" , "classic book" , "Castaway on desert island" , "one found on island" .)