Country we study after onset of storms (6)
I believe the answer is:
sweden
'country' is the definition.
(Sweden is an example)
'we study after onset of storms' is the wordplay.
'study' becomes 'den' (I've seen this before).
'after' says to put letters next to each other.
'onset of' indicates taking the first letters.
The first letter of 'storms' is 's'.
'we'+'den'='weden'
'weden' put after 's' is 'SWEDEN'.
(Other definitions for sweden that I've seen before include "land" , "in E" , "We send out to here, oddly" , "Member country of the European Union" , "Stockholm's country" .)