Dash into toilet, as terrified (5)
I believe the answer is:
taste
'dash' is the definition.
(I've seen this before)
'into toilet as terrified' is the wordplay.
'into' indicates a hidden word.
'TASTE' is hidden within 'toilet as terrified'.
(Other definitions for taste that I've seen before include "Selectivity" , "Show sense" , "Decorum" , "Appreciation, discernment" , "Fine perception" .)