Dont give in to an awful sister (6)
I believe the answer is:
resist
'dont give in' is the definition.
I can't tell whether this defines the answer.
'an awful sister' is the wordplay.
'an awful' indicates anagramming the letters.
'sister' anagrammed gives 'RESIST'.
'to' is the link.
Can you help me to learn more?
(Other definitions for resist that I've seen before include "Refuse to comply" , "Take stand against, oppose" , "Don't give in" , "Fight back" , "turn down" .)