Not hardy (6)
I believe the answer is:
tender
'not hardy' is the definition.
(tender can mean soft, ie not hardy)
This is the entire clue.
(Other definitions for tender that I've seen before include "Painful to the touch" , "Not tough - make a bid" , "Delicate sort of bid" , "Compassionate - sore" , "pathetic water-carrier, say" .)