Will that teach you not to go barefoot? (7)
I believe the answer is:
trainer
'go barefoot?' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'will that teach you not' is the wordplay.
'will' says to put letters next to each other (I've seen this in other clues).
'that teach' becomes 'train' (I've seen this in another clue).
'you not' becomes 'er' (I can't justify this - if you can you should give a lot more credence to this answer).
'train' next to 'er' is 'TRAINER'.
'to' is the link.
Can you help me to learn more?
(Other definitions for trainer that I've seen before include "Sports footwear" , "Terrain (anag.)" , "Plimsoll or sneaker" , "Soft shoe, small aircraft" , "Sports/casual shoe" .)