Certainly not the Ocean of Storms! (7)
I believe the answer is:
pacific
'ocean of storms' is the definition.
'pacific' can be an answer for 'ocean' (Pacific is an example). I am not certain of the 'of storms' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for pacific that I've seen before include "Non-combatant" , "Non-combative" , "water" , "Largest ocean" , "Peaceful in intent" .)