Can touring artist work out (5)
I believe the answer is:
train
'work out' is the definition.
(training is a kind of working out)
'can touring artist' is the wordplay.
'can' becomes 'tin' (synonyms).
'touring' means one lot of letters goes inside another (touring can mean going round).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'tin' going around 'ra' is 'TRAIN'.
(Other definitions for train that I've seen before include "Locomotive or part of bride's dress" , "Number of eg carriages in a line" , "Engine and carriages" , "Long back section of a gown that's drawn along the floor" , "Teach (someone) a skill" .)