Stylish base on a font? Not half! (7)
I believe the answer is:
elegant
'stylish' is the definition.
(both can mean fancy or ornate)
'base on a font? not half' is the wordplay.
'base on' becomes 'eleg' (I can't explain this - if you can you should give a lot more credence to this answer).
'not half' means to take half the letters.
'font' cut in half is 'nt'.
'eleg'+'a'+'nt'='ELEGANT'
Can you help me to learn more?
(Other definitions for elegant that I've seen before include "Cleverly simple" , "excellent!" , "Attractive and graceful or stylish" , "Polished" , "A gentle sort of stylish appearance" .)