Some overambitious revolutionary mother of Arabian (4)
I believe the answer is:
mare
'mother of arabian' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe there's an association between them I don't understand?
'some overambitious revolutionary' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'revolutionary' says the letters should be written in reverse.
'eram' can be found hidden inside 'overambitious'.
'eram' backwards is 'MARE'.
Can you help me to learn more?
(Other definitions for mare that I've seen before include "Adult female zebra" , "For classicists, sea" , "Adult female horse" , "A night-time strangler" , "Ream (anag)" .)