Lake jumped into by one who takes orders (6)
I believe the answer is:
waiter
'one who takes orders' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition. I also know that 'orders' relates to this answer.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for waiter that I've seen before include "Restaurant worker" , "Servant in bar" , "Restaurant employee" , "Attendant" , "Steward" .)