Vital cure could be moneymaking (9)
I believe the answer is:
lucrative
'moneymaking' is the definition.
(thesaurus)
'vital cure could be' is the wordplay.
'could be' indicates an anagram.
'vital'+'cure'='vitalcure'
'vitalcure' with letters rearranged gives 'LUCRATIVE'.
(Other definitions for lucrative that I've seen before include "Producing a sizeable profit" , "rewarding" , "Well-paid" , "Moneymaking" , "Making money" .)