Pass a mistake and go to pieces (8)
I believe the answer is:
collapse
'go to pieces' is the definition.
'pass a mistake' is the wordplay.
'pass' becomes 'col' (col is a kind of pass**).
'a mistake' becomes 'lapse' (lapse is a kind of mistake).
'col'+'lapse'='COLLAPSE'
'and' is the link.
(Other definitions for collapse that I've seen before include "downfall" , "Crumble" , "Suddenly fall down or give way" , "Break-down or complete failure" , "Fall or disintergrate" .)