Crossword Genius

A little reminder, for example, to ask repeatedly for money back (5)

Ross

I believe the answer is:

nudge

I'm a little stuck... Click here to teach me more about this clue!

'a little reminder' is the definition.
'nudge' can be an answer for 'reminder' (I've seen this in another clue). I am not sure about the 'a little' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for nudge that I've seen before include "Prod gently with elbow" , "Jogger" , "Slight push" , "Give a reminder" , "Dig with elbow" .)

I've seen this clue in The Guardian.
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