Nothing inserted in bottom moved upwards (5)
I believe the answer is:
arose
'moved upwards' is the definition.
The answer and definition can be both related to bodily activities as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'nothing inserted in bottom' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'inserted in' means one lot of letters goes inside another.
'bottom' becomes 'arse' (synonyms).
'o' inserted into 'arse' is 'AROSE'.
Can you help me to learn more?
(Other definitions for arose that I've seen before include "Got out of bed" , "Happened" , "appeared" , "Occurred; stood up" , "Became apparent" .)