Bird possessing a warm heart in a London street (6)
I believe the answer is:
warren
'a london street' is the definition.
The definition and answer can be both groups as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'bird possessing a warm heart' is the wordplay.
'bird' becomes 'wren' (wren is a kind of bird).
'possessing' indicates putting letters inside.
'heart' says to take the centre.
The centre of 'warm' is 'ar'.
'wren' enclosing 'ar' is 'WARREN'.
'in' is the link.
Can you help me to learn more?
(Other definitions for warren that I've seen before include "Rabbit burrow" , "Network of underground tunnels built by rabbits" , "boy" , "Colony of rabbits" , "Area of rabbit burrows" .)