Untrustworthy in bed, perhaps? (5)
I believe the answer is:
lying
'untrustworthy' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'in bed perhaps?' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lying that I've seen before include "Prone or supine" , "Prone; fibbing" , "dishonesty" , "Prevaricating" , "Anything but upright" .)