Look for German weapon (6)
I believe the answer is:
glance
'look' is the definition.
(I know that glance is a more specific form of the action look)
'german weapon' is the wordplay.
'german' becomes 'g' (abbreviation).
'weapon' becomes 'lance' (lance is a kind of weapon).
'g'+'lance'='GLANCE'
'for' is the link.
(Other definitions for glance that I've seen before include "Give a quick look" , "Take a quick look" , "black shiny stuff" , "A brief or casual look" , "A passing look." .)