Invest in stripping scheme after arterial obstruction (6)
I believe the answer is:
clothe
'invest' is the definition.
(I know that invest can be written as clothe)
'stripping scheme after arterial obstruction' is the wordplay.
'stripping' means to look at the middle letters.
'after' is a charade indicator (letters next to each other).
'arterial obstruction' becomes 'clot' (I can't justify this - if you can you should give a lot more credence to this answer).
The middle of 'scheme' is 'he'.
'he' put after 'clot' is 'CLOTHE'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for clothe that I've seen before include "Put garments onto" , "Provide cover for body and limbs" , "apparel" , "Attire" , "Remote area in Mongolia/China" .)