Bird makes dent in plane (7)
I believe the answer is:
cockpit
'plane' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'bird makes dent' is the wordplay.
'bird' becomes 'cock' (cock is a kind of bird).
'makes dent' becomes 'pit' (I am not sure about this - if you are sure you should believe this answer much more).
'cock'+'pit'='COCKPIT'
'in' is the link.
Can you help me to learn more?
(Other definitions for cockpit that I've seen before include "battlefield" , "flying from here" , "Site of numerous battles or campaigns" , "Pilot's compartment - scene of fighting" , "Front section of a plane" .)