Nobleman under pressure in Hawaiian harbour (5)
I believe the answer is:
pearl
'hawaiian harbour' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'nobleman under pressure' is the wordplay.
'nobleman' becomes 'earl' (member of the nobility).
'under' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'pressure' becomes 'p' (abbreviation).
'earl' after 'p' is 'PEARL'.
'in' is the link.
Can you help me to learn more?
(Other definitions for pearl that I've seen before include "Drop" , "Precious jewel from the oyster" , "Lustrous globule prized as a gem" , "Paragon" , "something highly valued" .)