"Peanuts" exclamation (4)
I believe the answer is:
rats
'peanuts exclamation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rats that I've seen before include "Heels" , "Blast" , "Damn" , "First word of 'The 21 19'" , "Hamelin's pests" .)