Nick comes back with kilo of snacks (4)
I believe the answer is:
tuck
'of snacks' is the definition.
The definition suggests a singular noun which matches the answer.
'nick comes back with kilo' is the wordplay.
'nick' becomes 'cut'.
'comes back' is a reversal indicator.
'with' means one lot of letters go next to another.
'kilo' becomes 'k' (phonetic alphabet: alpha, bravo, charlie etc.).
'cut' written backwards gives 'tuc'.
'tuc'+'k'='TUCK'
Can you help me to learn more?
(Other definitions for tuck that I've seen before include "Cover snugly - food" , "Position for diving" , "Food - fold edges in" , "legendary friar" , "goes with a nip?" .)