They may commemorate different battles (7)
I believe the answer is:
tablets
'they may commemorate' is the definition.
The definition suggests an adverb but the answer is not.
'different battles' is the wordplay.
'different' indicates anagramming the letters (letters placed in a different order).
'battles' anagrammed gives 'TABLETS'.
Can you help me to learn more?
(Other definitions for tablets that I've seen before include "Pills" , "Battles (anag.)" , "Pellets of medicine" .)