What's written after fantastic pit stops with little credit added
I believe the answer is:
postscript
'what's written after fantastic' is the definition.
I can't judge whether this defines the answer.
'pit stops with little credit added' is the wordplay.
I cannot really see how this works, but
an anagram of 'pit' is 'ipt' which is located in the answer.
an anagram of 'stops' is 'posts' which is located in the answer.
'credit' could be 'cr' and 'cr' is located in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for postscript that I've seen before include "PS" , "Last added words" , "Extra lines" , "belated comment" , "part of letter" .)