Second ornithologist creates habitat for bird (6)
I believe the answer is:
condor
'bird' is the definition.
(condor is a kind of bird)
'second ornithologist creates habitat' is the wordplay.
'CONDOR' is hidden within the letters.
But, I'm not sure how this is indicated.
'for' is the link.
Can you help me to learn more?
(Other definitions for condor that I've seen before include "Largest New World vulture" , "Great bird of the Andes" , "Large American vulture" , "Large bird of the Andes (national symbol of Peru)" , "Andean vulture" .)