What's SM roared right out? (5,4)
I believe the answer is:
order arms
'what's' is the definition.
Both the definition and answer are interjections.
Maybe there's a link between them I don't understand?
'sm roared right out?' is the wordplay.
'right' becomes 'r' (common abbreviation).
'out?' indicates anagramming the letters (out can mean wrong or inaccurate).
'sm'+'roared'+'r'='smroaredr'
'smroaredr' with letters rearranged gives 'ORDER ARMS'.
(Other definitions for order arms that I've seen before include "From stand showing weapons" , "made to officer's requirement" , "Military command" .)