Chat with climbers finally going to summit (5)
I believe the answer is:
speak
'chat' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'climbers finally going to summit' is the wordplay.
'finally' suggests the final letters.
'going to' means one lot of letters go next to another.
'summit' becomes 'peak' (mountain peak).
The final letter of 'climbers' is 's'.
's'+'peak'='SPEAK'
'with' is the link.
Can you help me to learn more?
(Other definitions for speak that I've seen before include "Say something" , "give a lecture" , "express" , "Converse" , "Utter words" .)