Mammals he or she so cryptically represented? (9,4)
I believe the answer is:
horseshoe bats
'mammals' is the definition.
(horseshoe bat is a kind of mammal)
'he or she so cryptically represented?' is the wordplay.
'cryptically' indicates anagramming the letters.
'represented?' becomes 'bats' (I can't justify this - if you can you should give a lot more credence to this answer).
'he'+'or'+'she'+'so'='heorsheso'
'heorsheso' is an anagram of 'horseshoe'.
'horseshoe'+'bats'='HORSESHOE BATS'
(Another definition for horseshoe bats that I've seen is " As mammals".)