Apartment with rook and bigger bird (6)
I believe the answer is:
'bigger bird' is the definition.
'condor' can be an answer for 'bird' (condor is a kind of bird). I'm unsure of the 'bigger' bit.
'apartment with rook' is the wordplay.
'apartment' becomes 'condo' (I have seen 'American apartment' mean 'condo' so perhaps 'apartment' could also mean 'condo').
'with' says to put letters next to each other.
'rook' becomes 'r' (abbreviation in chess).
'and' is the link.
Can you help me to learn more?
(Other definitions for condor that I've seen before include "Large vulture of S America", "Large American vulture", "Large bird of the Andes (national symbol of Peru)", "Large bird of prey", "South American vulture".)