Cameo in two pieces? (3,4)
I believe the answer is:
bit part
'cameo' is the definition.
(I've seen this before)
'two pieces?' is the wordplay.
'two pieces?' means two replacements for 'piece'.
'piece' becomes 'bit' (synonyms).
'piece' becomes 'part' (synonyms).
'bit'+'part'='BIT-PART'
'in' is the link.
(Other definitions for bit part that I've seen before include "Very minor role" , "Tool" , "extra work, perhaps" , "Small acting role" , "Tiny or non-speaking role in play" .)