Get rid of Times by end of decade (5)
I believe the answer is:
erase
'get rid of' is the definition.
(thesaurus)
'times by end of decade' is the wordplay.
'times' becomes 'eras' (era is a kind of time).
'by' is a charade indicator (letters next to each other).
'end of' suggests the final letters.
The final letter of 'decade' is 'e'.
'eras'+'e'='ERASE'
(Other definitions for erase that I've seen before include "Clear" , "Efface" , "To remove all trace" , "Put out of mind" , "Blot out" .)