Mum rushes around to stop wit becoming prophet (11)
I believe the answer is:
nostradamus
'prophet' is the definition.
(French astrologer and supposed prophet)
'mum rushes around to stop wit' is the wordplay.
I cannot really understand how this works, but
'around' could be 'o' (a round letter) and 'o' is present in the answer.
'stop' could be 'dam' (I've seen this in other clues) and 'dam' is located in the answer.
This explanation may well be incorrect...
'becoming' is the link.
Can you help me to learn more?
(Other definitions for nostradamus that I've seen before include "Famous prophesier" , "visionary legend" , "Old astrologer" , "Fr. C 16 astrologer" , "obscure old versifier" .)