Key affection for manual protection (5)
I believe the answer is:
glove
'manual protection' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'key affection' is the wordplay.
'key' becomes 'g' (musical key).
'affection' becomes 'love' (I've seen this before).
'g'+'love'='GLOVE'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for glove that I've seen before include "Proverbially good fitter" , "Hand-cover" , "one on hand?" , "Covering for hand" , "Hand in this is very closely associated" .)