Submissive medical man spread lie (6)
I believe the answer is:
docile
'submissive' is the definition.
(I've seen this before)
'medical man spread lie' is the wordplay.
'medical man' becomes 'doc' (doc is a kind of medical man).
'spread' indicates an anagram.
'lie' with letters rearranged gives 'ile'.
'doc'+'ile'='DOCILE'
(Other definitions for docile that I've seen before include "Gentle and teachable" , "Strong desire/impulse" , "'Submissive, easy to control (6)'" , "Gentle and biddable" , "Coiled in submissive way" .)