Might that be still belonging to me, a trawler at sea? (7,5)
I believe the answer is:
mineral water
'might that be still' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'belonging to me a trawler at sea?' is the wordplay.
'belonging to me' becomes 'mine' (I've seen this before).
'at sea?' is an anagram indicator (I've seen 'at sea' mean this).
'a'+'trawler'='atrawler'
'atrawler' anagrammed gives 'ralwater'.
'mine'+'ralwater'='MINERAL WATER'
Can you help me to learn more?
(Other definitions for mineral water that I've seen before include "Drink with natural salts" , "Still or sparkling?" , "Sparkler" .)