Worthless comrade shot (6)
I believe the answer is:
paltry
'worthless' is the definition.
(similar in meaning)
'comrade shot' is the wordplay.
'comrade' becomes 'pal' (a pal is a friend).
'shot' becomes 'try' (both can mean an attempt).
'pal'+'try'='PALTRY'
(Other definitions for paltry that I've seen before include "Worthless or trivial" , "Petty - worthless" , "Small and mean" , "Derisory" , "Trivial or contemptible" .)