Rustic Henry leaves bird (7)
I believe the answer is:
peasant
'rustic' is the definition.
(I know that peasant is a type of rustic)
'henry leaves bird' is the wordplay.
'henry leaves' becomes 'peas' (I can't justify this - if you can you should give a lot more credence to this answer).
'bird' becomes 'ant bird' (ant bird is a kind of bird).
'peas'+'ant'='PEASANT'
Can you help me to learn more?
(Other definitions for peasant that I've seen before include "Poor rustic" , "Rural person of low class" , "Yokel" , "Rustic fellow" , "Rural labourer" .)