Get expert treatment (7)
I believe the answer is:
procure
'get' is the definition.
(I know that procure is a kind of capture)
'expert treatment' is the wordplay.
'expert' becomes 'pro' (short for professional).
'treatment' becomes 'cure' (medical treatment).
'pro'+'cure'='PROCURE'
(Other definitions for procure that I've seen before include "Get by special effort" , "Acquire" , "Obtain; solicit" .)