A pencil drawing of a bird (7)
I believe the answer is:
pelican
'bird' is the definition.
(pelican is a kind of bird)
'a pencil drawing of a' is the wordplay.
'a pencil' can be anagrammed to 'PELICAN'.
However, I am not clear how this is indicated.
Can you help me to learn more?
(Other definitions for pelican that I've seen before include "Large-billed seabird" , "Tropical bird" , "Large water bird" , "Long-billed waterbird" , "Large bird with pouch in bill for storing fish" .)