Scare off animals round edge of forest (5)
I believe the answer is:
deter
'scare off' is the definition.
(thesaurus)
'animals round edge of forest' is the wordplay.
'animals' becomes 'deer'.
'round' means one lot of letters goes inside another.
'edge of forest' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'deer' placed around 't' is 'DETER'.
Can you help me to learn more?
(Other definitions for deter that I've seen before include "Dishearten" , "Try to prevent" , "Discourage or impede" , "Put (someone) off" , "Warn off" .)