Over four weeks' money lost at one Riviera resort — precariously placed (2,4,3)
I believe the answer is:
on thin ice
'precariously placed' is the definition.
'over four weeks' money lost at one riviera resort' is the wordplay.
I cannot quite understand how this works, but
'over' could be 'on' (physically on top of) and 'on' is found in the answer.
'money' could be 'c' and 'c' is located in the answer.
'at' could be 'in' (synonymous in some cases - eg at school, in school) and 'in' is present in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
The remaining letters 'the' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for on thin ice that I've seen before include "At risk" , "Unsafe" , "like a daredevil skater?" , "In a risky situation" , "in danger of a soaking?" .)