Attendants in group of monks can't be trusted (9)
I believe the answer is:
orderlies
'attendants' is the definition.
(I know this)
'group of monks can't be trusted' is the wordplay.
I cannot quite see how this works, but
'group' could be 'order' (order is a kind of group) and 'order' is found within the answer.
'be' could be 'lie' (lying is a kind of being) and 'lie' is found in the answer.
A single letter 's' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for orderlies that I've seen before include "Solderer I join as soldiers who do errands for officers" , "Soldiers attending superior officers" , "Hospital workers" , "Servants" , "Military or hospital attendants" .)