Do you sever all links with it? (5,3)
I believe the answer is:
chain saw
'do' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'sever all links with it?' is the wordplay.
I cannot quite see how this works, but
'links' could be 'chain' (a chain is made up of links) and 'chain' is found in the answer.
'with' could be 'w' (abbreviation) and 'w' is found within the answer.
'it?' could be 'sa' (old-fashioned abbreviation for sex appeal) and 'sa' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'you' acts as a link.
Can you help me to learn more?
(Other definitions for chain saw that I've seen before include "Power cutter" , "This is used for cutting" , "Motorised cutter" , "Texas massacre tool" , "Mechanical cutter" .)