European politician interrupting trial in storm (7)
I believe the answer is:
tempest
'storm' is the definition.
(I know that tempest is a type of windstorm)
'european politician interrupting trial' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'politician' becomes 'MP' (Member of Parliament).
'interrupting' indicates putting letters inside.
'trial' becomes 'test' (synonyms).
'e'+'mp'='emp'
'emp' going inside 'test' is 'TEMPEST'.
'in' acts as a link.
(Other definitions for tempest that I've seen before include "Outburst" , "Play (with rough weather)" , "Violent Shakespearian storm" , "Violent disturbance" , "Cyclone" .)