One in drama at sea, line astern? (7)
I believe the answer is:
admiral
'one in drama at sea line astern?' is the definition.
I can't judge whether this definition defines the answer.
'one in drama at sea line' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in' indicates putting letters inside.
'at sea' is an anagram indicator.
'line' becomes 'l' (used when specifying particular lines from a poem).
'drama' with letters rearranged gives 'admra'.
'i' inserted inside 'admra' is 'admira'.
'admira'+'l'='ADMIRAL'
Can you help me to learn more?
(Other definitions for admiral that I've seen before include "Naval chief" , "Navy chief" , "Senior officer; mad liar (anag.)" , "High-ranking naval officer like Nelson" , "Red butterfly at sea?" .)