Go on cue, rattling the tin going in (8)
I believe the answer is:
continue
'go' is the definition.
(I know that continue is a kind of go)
'on cue rattling the tin going in' is the wordplay.
'rattling' is an anagram indicator (letters rattle around).
'going in' means one lot of letters goes inside another.
'on'+'cue'='oncue'
'oncue' is an anagram of 'conue'.
'conue' going around 'tin' is 'CONTINUE'.
(Other definitions for continue that I've seen before include "Don't stop, keep going" , "Resume" , "Persist" , "Proceed" , "Go on without stopping" .)