Worms dog, angry-looking figure (7)
I believe the answer is:
hundred
'figure' is the definition.
The definition and answer can be both quantities as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'worms dog angry-looking' is the wordplay.
'worms dog' becomes 'hund' (I can't explain this - if you can you should believe this answer much more).
'angry-looking' becomes 'red'.
'hund'+'red'='HUNDRED'
Can you help me to learn more?
(Other definitions for hundred that I've seen before include "cricketing achievement" , "English county division" , "Former division of county" , "so many others" , "Five score" .)