Here ample breaks are short-lived (9)
I believe the answer is:
ephemeral
'are short-lived' is the definition.
(synonyms)
'here ample breaks' is the wordplay.
'breaks' indicates an anagram.
'here'+'ample'='hereample'
'hereample' with letters rearranged gives 'EPHEMERAL'.
(Other definitions for ephemeral that I've seen before include "short term gain" , "life's too short" , "Fleeting, lasting only a short time" , "Lasting only briefly" , "Fugitive" .)