Make a splash with popular show the boss scores (3,3,9)
I believe the answer is:
hit the headlines
'make a splash' is the definition.
I know nothing about this answer so I can't judge whether this works.
'popular show the boss scores' is the wordplay.
'popular show' becomes 'hit' (I've seen this in another clue).
'boss' becomes 'head' (synonyms).
'scores' becomes 'lines' (lining is a kind of scoring).
'hit'+'the'+'head'+'lines'='HIT THE HEADLINES'
'with' is the link.
Can you help me to learn more?
(Other definitions for hit the headlines that I've seen before include "Make the front cover" , "got top press billing" , "The banners supporting strike" , "advertise one's activities?" , "get prominent media attention" .)