Client offloading coke, crack, dope (5)
I believe the answer is:
intel
'dope' is the definition.
(both can mean information)
'client offloading coke crack' is the wordplay.
'offloading' indicates named letters should be taken away.
'coke' becomes 'C' (synonyms).
'crack' is an anagram indicator (I've seen 'cracked' mean this).
'client' with 'c' removed is 'lient'.
'lient' anagrammed gives 'INTEL'.
(Other definitions for intel that I've seen before include "US chip manufacturer" , "Chip manufacturer based in California" , "Information" , "military info" , "silicon chip manufacturer" .)