Doctor in nude? No, that's a malicious suggestion (8)
I believe the answer is:
innuendo
'a malicious suggestion' is the definition.
(I've seen this before)
'doctor in nude? no' is the wordplay.
'doctor' is an anagram indicator.
'in'+'nude'+'no'='innudeno'
'innudeno' is an anagram of 'INNUENDO'.
'that's' is the link.
(Other definitions for innuendo that I've seen before include "An unpleasant allusion or insinuation" , "Indirect implication" , "Subtle disparagement" , "suggested" , "An unpleasant insinuation or intimation" .)