Informer taped other suspect (4,6)
I believe the answer is:
deep throat
'informer' is the definition.
(informer in the Watergate scandal)
'taped other suspect' is the wordplay.
'suspect' indicates an anagram (a suspicious or unusual spelling).
'taped'+'other'='tapedother'
'tapedother' anagrammed gives 'DEEP THROAT'.
(Other definitions for deep throat that I've seen before include "Key informant" , "Secret informer" , "9d [WHISTLE BLOWER]" .)