Getting into stocks for one in official garment (10)
I believe the answer is:
investment
'getting into stocks' is the definition.
I can't tell whether this definition defines the answer.
'one in official garment' is the wordplay.
'official garment' becomes 'vestment' (I've seen this before. I am not sure about the 'official' bit.).
'in'+'vestment'='INVESTMENT'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for investment that I've seen before include "Something worth buying for future profit" , "One way to make gains" , "Something bought for its future value" , "siege" , "applying time and effort?" .)