Times table finally clear (5)
I believe the answer is:
erase
'clear' is the definition.
(I've seen this in another clue)
'times table finally' is the wordplay.
'times' becomes 'eras' (an era is a time or period).
'finally' says to take the final letters.
The final letter of 'table' is 'e'.
'eras'+'e'='ERASE'
(Other definitions for erase that I've seen before include "Take out" , "Obliterate" , "Kill" , "Eradicate" , "Blank out" .)