Crossword Genius

Old naval commander’s spoken of Christmas holiday at sea? (5,4)


I believe the answer is:

santa cruz

'old naval commander's' is the definition.
(Marquis of Santa Cruz, Spanish admiral)

I don't understand the rest of the clue.

(Other definitions for santa cruz that I've seen before include "Chief town on La Palma" , "South American city" , "Tenerife's main city" , "Tenerife capital" , "Californian city" .)

I've seen this clue in The Times.
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