Not unhappy greeting French resort, being in a delicate situation (2,4,3)
I believe the answer is:
on thin ice
'in a delicate situation' is the definition.
(I've seen this before)
'not unhappy greeting french resort' is the wordplay.
'unhappy' indicates anagramming the letters.
'greeting' becomes 'hi' (hi is a kind of greeting).
'french resort' becomes 'Nice' (French coastal resort).
'not' with letters rearranged gives 'ont'.
'ont'+'hi'+'nice'='ON THIN ICE'
'being' is the link.
(Other definitions for on thin ice that I've seen before include "like a daredevil skater?" , "In deep water" , "in danger of a soaking?" , "In a difficult position" , "At risk" .)