However casually learner is given direction, styles ensue (9)
I believe the answer is:
leastways
'however casually' is the definition.
'learner is given direction styles ensue' is the wordplay.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'is given' says to put letters next to each other.
'direction' becomes 'east' (compass direction).
'styles' becomes 'ways' (way of doing something).
'ensue' is a charade indicator (letters next to each other).
'l'+'east'+'ways'='LEASTWAYS'
(Other definitions for leastways that I've seen before include "anyhow" , "at any rate" , "As a minimum" , "If nothing else" , "in any event" .)