Little bag, scarlet, that one can’t touch (6)
I believe the answer is:
sacred
'that one can't touch' is the definition.
'little bag scarlet' is the wordplay.
'little bag' becomes 'sac'.
'scarlet' becomes 'red' ('red' can be a synonym of 'scarlet').
'sac'+'red'='SACRED'
(Other definitions for sacred that I've seen before include "devoted to deity" , "Holy, blessed" , "'Hallowed, holy (6)'" , "'Consecrated, holy (6)'" , "Religious" .)