Physicist backing Whistler’s claim? (5)
I believe the answer is:
fermi
'physicist' is the definition.
(Enrico Fermi the nuclear physicist)
'backing whistler's claim?' is the wordplay.
'backing' says the letters should be written backwards.
'whistler' becomes 'ref' (a referee blows a whistle).
'claim?' becomes 'mi' (I can't explain this - if you can you should believe this answer much more).
'ref' reversed gives 'fer'.
'fer'+'mi'='FERMI'
Can you help me to learn more?
(Other definitions for fermi that I've seen before include "Enrico, Italian Nobel prize physicist" , "Enrico -----, Italian nuclear physicist (1901-1954); in the US from 1939" .)