Submarine endures a buffeting (8)
I believe the answer is:
undersea
'submarine' is the definition.
(submarine means under the sea)
'endures a buffeting' is the wordplay.
'endures a' can be anagrammed to 'UNDERSEA'.
However, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for undersea that I've seen before include "Below marine surface" , "submerged" , "in salt water" , "Beneath the oceans" , "Where bed is" .)