Strong warning leader’s upset right (3,5)
I believe the answer is:
red alert
'strong warning' is the definition.
'red alert' can be an answer for 'warning' (I've seen this before). I am unsure of the 'strong' bit.
'leader's upset right' is the wordplay.
I cannot quite understand how this works, but
'right' could be 'rt' (abbreviation as in Rt Hon- the Right Honourable) and 'rt' is located in the answer.
an anagram of 'leader' is 'redale' which is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for red alert that I've seen before include "Urgent warning" , "High crisis level" , "State of readiness for imminent threat" , "Severe 1 dn" , "Alarm" .)