Storm created by English politician during trial (7)
I believe the answer is:
tempest
'storm' is the definition.
(tempest is a kind of storm)
'english politician during trial' is the wordplay.
'english' becomes 'e' (abbreviation).
'politician' becomes 'mp' (Member of Parliament).
'during' means one lot of letters goes inside another.
'trial' becomes 'test' (synonyms).
'e'+'mp'='emp'
'emp' inserted inside 'test' is 'TEMPEST'.
'created by' acts as a link.
(Other definitions for tempest that I've seen before include "A great storm of wind and rain" , "Violent Shakespearian storm" , "Wild storm" , "Pets met in violent storm" , "An angry storm as in Shakespeare play" .)