Short rest (8)
'short rest' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for breather that I've seen before include "Short rest break" , "lung, possibly?" , "Short rest between bouts of exercise" , "Short pause for rest" , "A rest - lung?" .)
'short rest' is the definition.
(to lie down is to have a short rest; 'short' suggests a short form)
This is the entire clue.
(Other definitions for lie-down that I've seen before include "Short rest" , "Rest (with or without sleep)" .)