Designers out of evening dresses - what's the chance of that? (5)
I believe the answer is:
evens
'chance of that?' is the definition.
'evens' can be an answer for 'chance' (I've seen this before). I'm unsure of the 'of that?' bit.
'designers out of evening dresses what's' is the wordplay.
I cannot quite see how this works, but
'evening' could be 'eve' (synonyms) and 'eve' is found within the answer.
This explanation may well be incorrect...
'the' acts as a link.
Can you help me to learn more?
(Other definitions for evens that I've seen before include "Levels - odds" , "1-1" , "Balanced odds" , "decreases" , "less likely than 27 [ODDS-ON]" .)