Show involving servant and soldier (7)
I believe the answer is:
pageant
'show' is the definition.
(a show or display)
'servant and soldier' is the wordplay.
'servant' becomes 'page' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'soldier' becomes 'ant' (soldier is a type of ant).
'page'+'ant'='PAGEANT'
'involving' is the link.
(Other definitions for pageant that I've seen before include "Dramatic performance" , "entertaining spectacle" , "Spectacular display" , "Splendid procession, parade" , "Extravagant dramatic display" .)