Son on time to start with nudges actor? (7)
I believe the answer is:
prompts
'nudges actor?' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how they can define each other.
'son on time to start' is the wordplay.
'son' becomes 's'.
'on time' becomes 'prompt' ('prompt' can be a synonym of 'on time').
'to start' means one lot of letters go next to another.
's' after 'prompt' is 'PROMPTS'.
'with' is the link.
Can you help me to learn more?
(Other definitions for prompts that I've seen before include "Gives hint to forgetful actor (7)" , "Assists actor by giving forgotten words" , "Performer's cues" , "Hints for forgetful actors" .)