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