Single man gets second opinion from evil spirit (3)
I believe the answer is:
imp
'evil spirit' is the definition.
(I've seen this in another clue)
'single man gets second opinion' is the wordplay.
'single' becomes 'i' (one).
'man' becomes 'm' (M is an abbreviation for male or masculine).
'gets' is a charade indicator (letters next to each other).
'second opinion' becomes 'p' (2nd letter of 'opinion').
'i'+'m'+'p'='IMP'
'from' is the link.
(Other definitions for imp that I've seen before include "Emperor" , "A mischievous little devil" , "Rascal" , "old-fashioned graft" , "Small mischievous spirit" .)