Set about a task from taciturn tourist (4,2)
I believe the answer is:
turn to
'set about a task' is the definition.
(I've seen this before)
'from taciturn tourist' is the wordplay.
'from' indicates the answer is hidden within the clue.
'TURN TO' is hidden in the letters of 'taciturn tourist'.
(Other definitions for turn to that I've seen before include "Get to work, get busy" , "set about a task" , "Consult with" , "Result in" , "Fall back on" .)