Coming on, tries to be inventive (2,5)
I believe the answer is:
in store
'coming' is the definition.
(I've seen this before)
'on tries to be inventive' is the wordplay.
'to be inventive' indicates an anagram (I've seen this in other clues).
'on'+'tries'='ontries'
'ontries' anagrammed gives 'IN STORE'.
(Other definitions for in store that I've seen before include "where shoppers are found" , "expected to appear" , "To come" , "coming soon" , "Waiting" .)