Expand unduly in France after the appointed time (7)
I believe the answer is:
inflate
'expand unduly' is the definition.
(I've seen this before)
'in france after the appointed time' is the wordplay.
'france' becomes 'f'.
'after' means one lot of letters go next to another.
'the appointed time' becomes 'late' (I can't explain this - if you can you should give a lot more credence to this answer).
'in'+'f'+'late'='INFLATE'
Can you help me to learn more?
(Other definitions for inflate that I've seen before include "Enlarge" , "Dilate" , "Exaggerate or fill with air" , "Fill with gas" , "Cause to swell" .)