A cop wrapped the child going out in a warm garment
I believe the answer is:
topcoat
'a warm garment' is the definition.
'topcoat' can be an answer for 'garment' (topcoat is a kind of garment). I'm not sure about the 'a warm' bit.
'a cop wrapped the child going out' is the wordplay.
'cop' becomes 'pc'.
'wrapped' is an insertion indicator.
'the child going' becomes 'toot' (I can't justify this - if you can you should believe this answer much more).
'out' is an insertion indicator.
'pc' placed inside 'toot' is 'topcot'.
'a' placed inside 'topcot' is 'TOPCOAT'.
'in' is the link.
Can you help me to learn more?
(Other definitions for topcoat that I've seen before include "Ulster?" , "It's worn on the outside in winter" , "clothing" , "Heavy winter outer garment" , "Final layer of paint" .)