Read aloud novel with male rabbit (4)

I believe the answer is:

buck

I'm a little stuck... Click here to teach me more about this clue!

'male rabbit' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for buck that I've seen before include "American's ready" , "Oppose N US dollar" , "Male animal - dollar" , "Doe's mate" , "Antelope - dollar" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

Want a hint initially instead of a full solution? Install my app