Short bursts help me, saving time (9)
I believe the answer is:
ephemeral
'short' is the definition.
(thesaurus)
'bursts help me saving time' is the wordplay.
'bursts' indicates an anagram.
'saving' means one lot of letters goes inside another.
'time' becomes 'era' (era is a kind of time).
'help'+'me'='helpme'
'helpme' anagrammed gives 'epheml'.
'epheml' going around 'era' is 'EPHEMERAL'.
(Other definitions for ephemeral that I've seen before include "Transitory" , "Fleeting, lasting only a short time" , "staying for a little while" , "short term gain" , "not going to last long" .)