Pass pond noise (5)
I believe the answer is:
croak
I believe this clue is a double definition.
'pass' is the first definition.
(I know that pass can be written as croak)
'pond noise' is the second definition.
(I've seen this in another clue)
(Other definitions for croak that I've seen before include "Noise from pond life - die" , "Frog's call" , "Make a froggy sound" , "Caw" , "Frog's sound - die" .)