Ring found by a sibling in desert's fertile spot (5)
I believe the answer is:
oasis
'fertile spot' is the definition.
(I've seen this before)
'ring found by a sibling' is the wordplay.
'ring' becomes 'O' (letter resembling a ring).
'found by' is a charade indicator (letters next to each other).
'sibling' becomes 'sis' (short for sister).
'o'+'a'+'sis'='OASIS'
'in desert's' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for oasis that I've seen before include "A place of safety or sanctuary" , "Britpop group" , "Fertile place in a desert, a watering hole" , "Place of refreshment" , "Area of calm amid hectic surroundings" .)