Crossword Genius

Heartless German soldier pinches used, sleeveless jumper (6)

Ross

I believe the answer is:

jersey

I'm a little stuck... Click here to teach me more about this clue!

'jumper' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for jersey that I've seen before include "Garment - cow - island" , "Milked" , "Something one may put on" , "Pullover; an island" , "One of the Channel Islands" .)

Want a hint initially instead of a full solution? Install my app