Meaning found in Amundsen Sea (5)
I believe the answer is:
sense
'meaning' is the definition.
(I know that sense is a type of meaning)
'in amundsen sea' is the wordplay.
'in' indicates a hidden word.
'SENSE' is hidden in the letters of 'amundsen sea'.
'found' is the link.
(Other definitions for sense that I've seen before include "Meaning; perception" , "Feeling - reason" , "Suspect" , "Feel intuitively" , "Meaning - feeling" .)