See trident at sea getting curious (10)
I believe the answer is:
interested
'curious' is the definition.
(similar in meaning)
'see trident at sea' is the wordplay.
'at sea' indicates anagramming the letters.
'see'+'trident'='seetrident'
'seetrident' anagrammed gives 'INTERESTED'.
'getting' is the link.
(Other definitions for interested that I've seen before include "Attentive" , "Showing curiosity" , "Not impartial" , "Partisan" , "prejudiced" .)