The firemen called out will get lost (2,2,6)
I believe the answer is:
go to blazes
'the firemen called out' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'get lost' is the wordplay.
I cannot quite understand how this works, but
'get' could be 'go' (synonyms) and 'go' is present in the answer.
'lost' could be 'l' (abbreviation in sporting league tables) and 'l' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'will' acts as a link.
Can you help me to learn more?
(Other definitions for go to blazes that I've seen before include "Firefighters will" , "be damned" , "Dismissive expression (referring to hell)" .)