Goes without saying that no cabs transported yours truly (8)
I believe the answer is:
absconds
'goes without saying that' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how one could define the other.
'no cabs transported yours truly' is the wordplay.
'no' becomes 'O' (resembles 0 - 'no' can mean 'zero').
'transported' is an anagram indicator.
'yours truly' becomes 'nds' (I can't justify this - if you can you should believe this answer much more).
'o'+'cabs'='ocabs'
'ocabs' with letters rearranged gives 'absco'.
'absco'+'nds'='ABSCONDS'
Can you help me to learn more?
(Other definitions for absconds that I've seen before include "Flees to escape from a legal process" , "Does a bunk" , "Decamps" , "Bolts, runs away" , "Flees, runs away" .)