Beast turned up with mother (4)
I believe the answer is:
puma
'beast' is the definition.
(puma is an animal)
'turned up with mother' is the wordplay.
'turned' shows that the letters should be reversed in order.
'with' says to put letters next to each other.
'mother' becomes 'ma' (ma can mean mother).
'up' in reverse letter order is 'pu'.
'pu'+'ma'='PUMA'
(Other definitions for puma that I've seen before include "American wildcat" , "American wild cat" , "Large wild American feline" , "Large American cat" , "Large American feline resembling a lion" .)