Help get Charlie away from corrosive liquid (3)
I believe the answer is:
aid
'help' is the definition.
(synonyms)
'charlie away from corrosive liquid' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet).
'away from' suggests deleting specific letters.
'corrosive liquid' becomes 'acid' (I've seen this before).
'acid' with 'c' removed is 'AID'.
'get' acts as a link.
(Other definitions for aid that I've seen before include "Relief" , "Help, assistance" , "welfare" , "Auxiliary" , "Care, assistance" .)