Prickly girl? (5)
I believe the answer is:
holly
'prickly girl?' is the definition.
'Holly' can be an answer for 'girl?'. I'm not certain of the 'prickly' bit.
'girl?' is the wordplay.
I cannot quite see how this works, but
'girl?' could be 'olly' and 'olly' is present in the answer.
A single letter 'h' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for holly that I've seen before include "Ilex is its genus" , "Shrub with red berries" , "Ilex -- popular at Christmas" , "Prickly shrub" , "Prickly evergreen" .)