Invest in a form of conveyance (6)
I believe the answer is:
induct
'invest' is the definition.
(I know that invest can be written as induct)
'in a form of conveyance' is the wordplay.
'a form of conveyance' becomes 'duct' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in'+'duct'='INDUCT'
Can you help me to learn more?
(Other definitions for induct that I've seen before include "Introduce" , "Accept into an exclusive society or group" , "Bring formally into organisation, initiate" , "Bring or lead in as for initiation" , "Formally admit (to a post or organisation)" .)