Turn up with a growl - a beastly noise? (4)
I believe the answer is:
purr
'a beastly noise?' is the definition.
The answer and definition can be both related to natural events as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'turn up with a growl' is the wordplay.
'turn' says the letters should be written in reverse.
'with' is a charade indicator (letters next to each other).
'a growl' becomes 'rr' (I am not sure about this - if you are sure you should believe this answer much more).
'up' in reverse letter order is 'pu'.
'pu'+'rr'='PURR'
Can you help me to learn more?
(Other definitions for purr that I've seen before include "Happy feline sound" , "Soft sound from car or cat" , "Appreciative feline sound" , "Sound like happy cat" , "Cat's contented sound" .)