Public swimming pool found in solid oasis (4)
I believe the answer is:
lido
'public swimming pool' is the definition.
'lido' can be an answer for 'pool' (I've seen this before). I am not certain of the 'public swimming' bit.
'in solid oasis' is the wordplay.
'in' indicates a hidden word.
'LIDO' is hidden in the letters of 'solid oasis'.
'found' acts as a link.
Can you help me to learn more?
(Other definitions for lido that I've seen before include "Open-air swimming pool" , "Swimming and leisure area" , "Swim here" , "Public bathing beach" , "Aquatic leisure centre" .)