Break bar, there shattered (8)
I believe the answer is:
breather
'break' is the definition.
(I know that breather is a type of break)
'bar there shattered' is the wordplay.
'shattered' is an anagram indicator.
'bar'+'there'='barthere'
'barthere' is an anagram of 'BREATHER'.
(Other definitions for breather that I've seen before include "Recovery time" , "Short pause for rest" , "Short rest between bouts of exercise" , "A rest - lung?" , "A rest from work - rather be thus" .)