Break a saucer in pieces? (7)
I believe the answer is:
caesura
'break' is the definition.
(caesura is a kind of break)
'a saucer in pieces?' is the wordplay.
'in pieces?' is an anagram indicator (I've seen 'in pieces' mean this).
'a'+'saucer'='asaucer'
'asaucer' with letters rearranged gives 'CAESURA'.
(Other definitions for caesura that I've seen before include "Pause or interruption (in conversation or prose)" , "Pause near middle of verse line" , "Break in line" , "Short pause in a line of verse" .)