Ace in flying saucer gets break (7)
I believe the answer is:
caesura
'break' is the definition.
(I know that caesura is a type of break)
'ace in flying saucer' is the wordplay.
'ace' becomes 'a' (abbreviation).
'in' means one lot of letters goes inside another.
'flying' indicates an anagram (letters fly around into new positions).
'saucer' anagrammed gives 'cesura'.
'a' inserted into 'cesura' is 'CAESURA'.
'gets' is the link.
(Other definitions for caesura that I've seen before include "Pause near middle of verse line" , "Pause or interruption (in conversation or prose)" , "Short pause in a line of verse" , "Break in line" .)