Ocean and seas strewn with desert islands? (5)
I believe the answer is:
oases
'desert islands?' is the definition.
(I've seen this in another clue)
'ocean and seas strewn' is the wordplay.
'ocean' becomes 'o' (this might be a standard abbreviation I've not previously seen).
'and' says to put letters next to each other.
'strewn' indicates anagramming the letters.
'seas' is an anagram of 'ases'.
'o'+'ases'='OASES'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for oases that I've seen before include "Where there may be dates" , "Fertile desert spots" , "Fertile areas in deserts" , "Fertile desert places" , "These sanctuaries" .)