To start with, grey parrot caught small lizard (5)
I believe the answer is:
gecko
'small lizard' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for gecko that I've seen before include "Small tropical lizard" , "Wall Street character" , "Thick-bodied lizard" , "Small lizard with adhesive foot-pads" , "Display" .)