What the tough old bird is wearing?
'what the' is the definition.
I can't judge whether this definition defines the answer.
'tough old bird is wearing?' is the wordplay.
'tough old bird' becomes 'boiler' (I've seen this before).
'is wearing?' becomes 'suit' (I am not sure about this - if you are sure you should believe this answer much more).
'boiler'+'suit'='BOILERSUIT'
Can you help me to learn more?
(Another definition for boilersuit that I've seen is " Overalls".)
'what the' is the definition.
I can't tell whether this definition defines the answer.
'tough old bird is wearing?' is the wordplay.
'tough old bird' becomes 'boiler' (I've seen this before).
'is wearing?' becomes 'suit' (I can't explain this - if you can you should believe this answer much more).
'boiler'+'suit'='BOILER SUIT'
Can you help me to learn more?
(Other definitions for boiler suit that I've seen before include "Overall" , "Protective clothing" , "Workwear" .)