Mo Salah's top clips noted abroad (5,6)
I believe the answer is:
split second
'mo' is the definition.
(I know that split second is a type of mo)
'salah's top clips noted abroad' is the wordplay.
'top' suggests taking the first letters (in a down clue, the first letter is top).
'abroad' indicates an anagram (abroad can mean moving around).
The first letter of 'salah' is 's'.
'clips'+'noted'='clipsnoted'
'clipsnoted' is an anagram of 'plitsecond'.
's'+'plitsecond'='SPLIT-SECOND'
(Other definitions for split second that I've seen before include "Instant" , "Very little time" , "Twinkling of an eye" , "An extremely short time" , "Very brief moment of time" .)