Inspirational slogan (5)
I believe the answer is:
motto
'inspirational slogan' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for motto that I've seen before include "Phrase on, eg, family coat of arms" , "Phrase to express character" , "Short sentence expressing an ideal" , "statement of belief" , "Words often found on coat of arms" .)