It helps to have a super grand finale! (3)
I believe the answer is:
aid
'it helps' is the definition.
(I've seen this in another clue)
'have a super grand finale' is the wordplay.
'have a super' becomes 'ai' (I am not sure about this - if you are sure you should believe this answer much more).
'finale' says to take the final letters.
The last letter of 'grand' is 'd'.
'ai'+'d'='AID'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for aid that I've seen before include "Help or support" , "Help. Assist" , "Care, assistance" , "technique that can produce pregnancy" , "encouragement" .)