Last word of the Pledge of Allegiance
I believe the answer is:
all
'last word of the pledge of allegiance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for all that I've seen before include "'Bless 'em - - ' (song)" , "See 10 Across" , "without exception" , "and 16 Across and 23 Across: Even so" , "and 18: 'Sing through -- --' (carol)" .)