Bought stock was initially tolerated (9)
I believe the answer is:
swallowed
'bought' is the definition.
(swallowing is a kind of buying)
'stock was initially tolerated' is the wordplay.
'initially' suggests taking the first letters.
'tolerated' becomes 'allowed' (I can't explain this - if you can you should give a lot more credence to this answer).
The first letters of 'stock was' is 'sw'.
'sw'+'allowed'='SWALLOWED'
Can you help me to learn more?
(Other definitions for swallowed that I've seen before include "drunk maybe" , "Gulped" , "Ingested" , "believed" , "Meekly accepted" .)