Come together to see single component made by egghead (5)
I believe the answer is:
unite
'come together' is the definition.
(to unite is to come or join together)
'single component made by egghead' is the wordplay.
'single component' becomes 'unit' (I've seen this in another clue).
'made by' says to put letters next to each other (letters written or made by another set of letters).
'egghead' becomes 'e' (head letter of 'egg').
'unit'+'e'='UNITE'
'to see' is the link.
(Other definitions for unite that I've seen before include "Amalgamate" , "Put together" , "Become an integrated whole" , "Pull together" , "Bring together, become one" .)