Mother may give one a poke in the eye (6)
I believe the answer is:
needle
'poke in the eye' is the definition.
'needle' can be an answer for 'poke' (thesaurus). I'm not sure about the 'in the eye' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for needle that I've seen before include "Annoy - syringe" , "Wind up" , "Annoy by continuous criticism; stylus" , "peak" , "pinnacle of rock" .)