Teach imp about expressing forcefully (8)
I believe the answer is:
emphatic
'expressing forcefully' is the definition.
I can't judge whether this definition defines the answer.
'teach imp about' is the wordplay.
'about' is an anagram indicator.
'teach'+'imp'='teachimp'
'teachimp' with letters rearranged gives 'EMPHATIC'.
Can you help me to learn more?
(Other definitions for emphatic that I've seen before include "Impact he combined with special stress" , "Forceful - pronounced" , "Definite and clear" , "Forceful in utterance" , "Expressing oneself with vigour and conviction" .)