Five imps are turning into blood-suckers (8)

I believe the answer is:
vampires
'blood-suckers' is the definition.
I can't tell whether this definition defines the answer.
'five imps are turning' is the wordplay.
'five' becomes 'V' (Roman numeral).
'turning' indicates an anagram.
'imps'+'are'='impsare'
'impsare' anagrammed gives 'ampires'.
'v'+'ampires'='VAMPIRES'
'into' is the link.
Can you help me to learn more?
(Other definitions for vampires that I've seen before include "Night owls" , "Dracula's people" , "Blood-suckers like Dracula" .)
