Ginger is out of practice (5)
I believe the answer is:
rusty
'out of practice' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rusty that I've seen before include "showing sign of inactivity?" , "Behind the times" , "Affected by corrosion - out of practice" , "(Of iron) affected by damp" , "Having a reddish-orange oxide coating" .)