Talk with Spanish leader at summit (5)
I believe the answer is:
speak
'talk' is the definition.
(I know that talk can be written as speak)
'spanish leader at summit' is the wordplay.
'leader' says to take the initial letters.
'at' says to put letters next to each other.
'summit' becomes 'peak' (mountain peak).
The initial letter of 'spanish' is 's'.
's'+'peak'='SPEAK'
'with' acts as a link.
(Other definitions for speak that I've seen before include "express" , "Say something" , "Talk" , "give a lecture" , "Utter words" .)