Half dead on dope at the station (5)
I believe the answer is:
depot
'the station' is the definition.
(depot is a kind of station)
'half dead on dope' is the wordplay.
'half' suggests halving the letters.
'on' means one lot of letters go next to another.
'dope' becomes 'pot' (both can informally mean cannabis).
'dead' with half the letters taken is 'de'.
'de'+'pot'='DEPOT'
'at' acts as a link.
(Other definitions for depot that I've seen before include "Depository for goods" , "Store for large quantities" , "Regimental HQ" , "Storage place" , "Storage location" .)