Couple you distrust around sandwiches (3)
I believe the answer is:
duo
'couple' is the definition.
(I know that couple can be written as duo)
'you distrust around sandwiches' is the wordplay.
'sandwiches' indicates a hidden word (the answer is sandwiched in by the clue).
'around' says the letters should be written in reverse.
'oud' can be found hidden inside 'you distrust'.
'oud' reversed gives 'DUO'.
(Other definitions for duo that I've seen before include "Brace" , "Performing couple" , "Pair of performers" , "Double act" , "Couple, pair" .)