First signs of limp elastic in some worn bloomers? (3)
I believe the answer is:
lei
'some worn bloomers?' is the definition.
(garland of flowers worn round the neck)
'first signs of limp elastic in' is the wordplay.
'first signs of' suggests taking the first letters.
The initial letters of 'limp elastic in' is 'LEI'.
(Other definitions for lei that I've seen before include "ready in Romania" , "Blooming string" , "What Romanians spend" , "Flower garland of Hawaii" , "Necklace of tropical flowers" .)