Wild hare associated with the ostrich (4)
I believe the answer is:
rhea
'the ostrich' is the definition.
The definition and answer can be both animals as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'wild hare' is the wordplay.
'wild' indicates an anagram.
'hare' is an anagram of 'RHEA'.
'associated with' is the link.
Can you help me to learn more?
(Other definitions for rhea that I've seen before include "Ostrich-like bird of South America" , "Ostrich-like bird - satellite of Saturn" , "New World flightless bird" , "S American runner" , "New World ostrich" .)