Suspect cold nurse is a rogue (9)
I believe the answer is:
scoundrel
'a rogue' is the definition.
(I've seen this before)
'suspect cold nurse' is the wordplay.
'suspect' is an anagram indicator (a suspicious or unusual spelling).
'cold'+'nurse'='coldnurse'
'coldnurse' is an anagram of 'SCOUNDREL'.
'is' acts as a link.
(Other definitions for scoundrel that I've seen before include "Person that's low" , "Bounder" , "Rat" , "bad egg" , "Disreputable type" .)