If you want to get the bird, don't put her off! (5)
I believe the answer is:
heron
'don't put her off' is the definition.
I can't tell whether this defines the answer.
'if you want to get the bird' is the wordplay.
'if you want' becomes 'ro' (I can't justify this - if you can you should believe this answer much more).
'to get' indicates putting letters inside.
'the bird' becomes 'hen' (hen is a kind of bird).
'ro' put inside 'hen' is 'HERON'.
Can you help me to learn more?
(Other definitions for heron that I've seen before include "Large fish-eating bird" , "Tall wading bird" , "Wading bird with long neck and legs" , "One bird" , "Long-legged long-necked wading bird" .)