Psychologist fellow mistreated bird (6,4)

I believe the answer is:

jungle fowl

'bird' is the definition.
(jungle fowl is a kind of bird)

'psychologist fellow mistreated' is the wordplay.
'psychologist' becomes 'jung' (Carl Jung).
'mistreated' indicates an anagram.
'fellow' anagrammed gives 'lefowl'.
'jung'+'lefowl'='JUNGLE FOWL'

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.