Get, acquire (6)
I believe the answer is:
obtain
I believe this clue is a double definition.
'get' is the first definition.
(I know that get can be written as obtain)
'acquire' is the second definition.
(I know this)
(Other definitions for obtain that I've seen before include "'Get, acquire (6)'" , "Get, procure" , "Acquire or procure" , "Get - secure" , "Hold good" .)