Dress used by ballerina twice the same day (4)
I believe the answer is:
tutu
'dress' is the definition.
(I have seen 'Short dress' mean 'tutu' so perhaps 'dress' could also mean 'tutu')
'ballerina twice the same day' is the wordplay.
I cannot quite understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
The remaining letters 'utu' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'used by' acts as a link.
Can you help me to learn more?
(Other definitions for tutu that I've seen before include "Ballerina's costume" , "Ballet dancer's costume" , "Short dress" , "8 [BALLET] term" , "Ballet dress" .)