Vulnerable type meeting bird (7,4)
I believe the answer is:
sitting duck
'vulnerable type' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'meeting bird' is the wordplay.
'meeting' becomes 'sitting' (sitting is a kind of meeting).
'bird' becomes 'duck' (duck is a kind of bird).
'sitting'+'duck'='SITTING DUCK'
Can you help me to learn more?
(Other definitions for sitting duck that I've seen before include "Obvious target" , "Easy target" , "Potential victim" , "Helpless victim" , "Wide-open target" .)