All the drink a learner driver can have! (5)
I believe the answer is:
total
'all' is the definition.
(thesaurus)
'the drink a learner driver can have' is the wordplay.
I cannot quite see how this works, but
'drink' could be 'tot' (I've seen this before) and 'tot' is found within the answer.
'a' is present in the answer.
'learner' could be 'l' and 'l' is found within the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for total that I've seen before include "Reckon" , "Completely destroy" , "Complete, entire amount" , "Final tally" , "Whole, complete" .)