One having stopped others, here's another test (5)
I believe the answer is:
resit
'another test' is the definition.
'resit' can be an answer for 'test' (I have seen 'Second test' mean 'resit' so perhaps 'test' could also mean 'resit'). I'm unsure of the 'another' bit.
'one having stopped others' is the wordplay.
'one' becomes 'i' (Roman numeral).
'having stopped' means one lot of letters goes inside another (stopping can mean blocking a gap).
'others' becomes 'rest' (eg the rest of a group).
'i' put into 'rest' is 'RESIT'.
'here's' is the link.
Can you help me to learn more?
(Other definitions for resit that I've seen before include "Student's test" , "later exam" , "second exam" , "Repeat (an exam)" , "second try at test" .)