Handle the company's capital (5)
I believe the answer is:
stock
This clue is a triple definition!
'handle' is the first definition.
(I know that stock is a type of handle)
'the company's' is the second definition.
(stock company is a kind of company)
'capital' is the third definition.
(I know that stock is a type of capital)
(Other definitions for stock that I've seen before include "shop's saleable items" , "Reputation; shares" , "Goods in store" , "Supply; plant" , "Wares" .)