Pot knocked over — little crash? (3)

I believe the answer is:
nap
'little crash?' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'pot knocked over' is the wordplay.
'pot' becomes 'pan' (I've seen this in other clues).
'knocked over' says the letters should be written backwards.
'pan' back-to-front is 'NAP'.
Can you help me to learn more?
(Other definitions for nap that I've seen before include "A brief sleep, forty winks" , "soft, fluffy surface" , "raised bits of velvet" , "A daytime doze" , "Snatch forty winks" .)
