Bully people to serve without reply (6)
I believe the answer is:
menace
'bully' is the definition.
(I've seen this in another clue)
'people to serve without reply' is the wordplay.
I cannot quite understand how this works, but
'people' could be 'men' (men are people) and 'men' is found within the answer.
'serve' could be 'ace' (type of tennis serve) and 'ace' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for menace that I've seen before include "Act in a threatening manner" , "Threat or severe nuisance" , "Serious threat" , "serious nuisance" , "A source of danger" .)