Sharp facilitator of trip in charge (6)
I believe the answer is:
acidic
'sharp' is the definition.
(I've seen this in another clue)
'facilitator of trip in charge' is the wordplay.
'facilitator of trip' becomes 'acid' (I am not sure about this - if you are sure you should believe this answer much more).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'acid'+'ic'='ACIDIC'
Can you help me to learn more?
(Other definitions for acidic that I've seen before include "Containing a sour-tasting substance" , "Like vinegar" , "Tasting sharp or sour" , "Sour; bitter" , "Sharp-tasting, sour" .)