Weirdly calm mediator, with emotions running high (12)
I believe the answer is:
melodramatic
'emotions running high' is the definition.
I can't judge whether this defines the answer.
'weirdly calm mediator' is the wordplay.
'weirdly' indicates an anagram.
'calm'+'mediator'='calmmediator'
'calmmediator' with letters rearranged gives 'MELODRAMATIC'.
'with' is the link.
Can you help me to learn more?
(Other definitions for melodramatic that I've seen before include "Emotionally overblown (in theatre)" , "Exaggerated - over-emotional" , "like ham?" , "Sensational" .)