Everyone to repeat and use words that begin identically (10)
I believe the answer is:
alliterate
'and use words that begin identically' is the definition.
I can't judge whether this definition defines the answer.
'everyone to repeat' is the wordplay.
'everyone' becomes 'all' (I've seen this before).
'to repeat' becomes 'iterate' (synonyms).
'all'+'iterate'='ALLITERATE'
Can you help me to learn more?
(Other definitions for alliterate that I've seen before include "put with a lot of bees?" , "say bollocks to Brexit?" .)