Might she become old, and just a bit ugly? (5)
I believe the answer is:
dolly
'might she' is the definition.
'Dolly' can be an answer for 'she'. I'm not certain of the 'might' bit.
'old and just a bit ugly?' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'old' is 'dol' which is present in the answer.
This explanation may well be incorrect...
'become' is the link.
Can you help me to learn more?
(Other definitions for dolly that I've seen before include "A special sheep" , "See 17" , "Easy cricket catch" , "Child's plaything" , "loved by little girl?" .)