To prevaricate is the last chance for a learner (5)
I believe the answer is:
stall
'to prevaricate' is the definition.
(thesaurus)
'the last chance for a learner' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'a' is found in the answer.
'learner' could be 'l' (as in a learner driver with L-plates on their car) and 'l' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'is' acts as a link.
Can you help me to learn more?
(Other definitions for stall that I've seen before include "Booth; prevaricate" , "Cowshed or stable" , "(Of engine) stop running; booth" , "Animal compartment" , "Box" .)