Short rocker shot in land of five rivers (6)
I believe the answer is:
punjab
'land of five rivers' is the definition.
The definition suggests a singular noun which matches the answer.
'short rocker shot' is the wordplay.
'short rocker' becomes 'pun' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'shot' becomes 'jab' (both can mean an injection).
'pun'+'jab'='PUNJAB'
'in' is the link.
Can you help me to learn more?
(Other definitions for punjab that I've seen before include "Province of Pakistan, capital Lahore" , "Region of NW India and NE Pakistan, chief city Lahore" , "State of NW India, chief city Lahore" , "Province in both India and Pakistan" , "India/Pakistan border region" .)