Ignorant girl somewhere in Herts (7)
I believe the answer is:
unaware
'ignorant' is the definition.
(I've seen this before)
'girl somewhere in herts' is the wordplay.
I cannot really understand how this works, but
'girl' could be 'una' (girl's name) and 'una' is found within the answer.
The remaining letters 'ware' is a valid word 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 unaware that I've seen before include "Ignorant - unenlightened" , "Lacking knowledge (of a situation or fact)" , "Uninformed" , "Not congnisant (of)" , "Innocent" .)