Lessons to be had from this large city bird? (7)
I believe the answer is:
lectern
'lessons to be had from this' is the definition.
(a lesson might be read from a lectern)
'large city bird?' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'city' becomes 'EC' (the City of London postcode).
'bird?' becomes 'tern' (tern is a kind of bird).
'l'+'ec'+'tern'='LECTERN'
(Other definitions for lectern that I've seen before include "Orator's stand" , "speeches may come from this" , "Slanted reading desk" , "Bible stand" , "Support for bible in church" .)