I am touring university after work, getting narcotic (5)
I believe the answer is:
opium
'narcotic' is the definition.
(opium is a kind of narcotic)
'i am touring university after work' is the wordplay.
'i am' becomes 'im'.
'touring' indicates putting letters inside (touring can mean going round).
'university' becomes 'u'.
'after' says to put letters next to each other.
'work' becomes 'op' (abbreviation for opus).
'im' placed around 'u' is 'ium'.
'ium' put after 'op' is 'OPIUM'.
'getting' is the link.
(Other definitions for opium that I've seen before include "Poppy-based drug" , "Derivative of Poppy" , "justification for war once?" , "Number" , "powerful drug" .)