Husband effectively to provide this plant? (6)
I believe the answer is:
thrift
'this plant?' is the definition.
(type of plant)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for thrift that I've seen before include "Care in using money" , "Economical management of money or resources" , "Careful management of money" , "Good husbandry" , "Careful control of resources" .)