Discharge explosive spirit bottles (5)
I believe the answer is:
rheum
'discharge' is the definition.
(thesaurus)
'explosive spirit bottles' is the wordplay.
'explosive' becomes 'he' (abbreviation for high explosive).
'spirit' becomes 'rum' (I've seen this before).
'bottles' is an insertion indicator ('bottle' can mean to contain).
'he' going within 'rum' is 'RHEUM'.
(Other definitions for rheum that I've seen before include "Rhubarb genus; a head cold" , "Watery discharge; sounds like space" , "nasal discharge" , "Watery stuff" , "that's rather snotty?" .)