Person of vital force (3)
I believe the answer is:
alf
'person' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'of vital force' is the wordplay.
'of' says the answer is hidden in the clue.
'ALF' can be found hidden inside 'vital force'.
Can you help me to learn more?
(Other definitions for alf that I've seen before include "Garnett or Ramsey?" , "- Ramsey, England manager in nineteen sixty six" , "See man" , "Chap" , "Great king briefly" .)