Don't be in a hurry to use a stopwatch (4,4)

'don't' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'be in a hurry to use a stopwatch' is the wordplay.
I cannot really understand how this works, but
'be' could be 'take' (taking is a kind of being) and 'take' is found in the answer.
'use a stopwatch' could be 'time' (I've seen this in another clue) and 'time' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?