Loiters uncertainly in luxury resort (7)
I believe the answer is:
estoril
'luxury resort' is the definition.
'estoril' can be an answer for 'resort' (I have seen 'Portuguese resort' mean 'estoril' so perhaps 'resort' could also mean 'estoril'). I am not sure about the 'luxury' bit.
'loiters uncertainly' is the wordplay.
'uncertainly' indicates an anagram.
'loiters' anagrammed gives 'ESTORIL'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for estoril that I've seen before include "It's in Portugal" , "Portuguese resort" .)