Exact revenge and look after number one? (3,4,3,4)
I believe the answer is:
get ones own back
'exact revenge' is the definition.
'look after number one?' is the wordplay.
I cannot quite understand how this works, but
'look' could be 'tone' (synonyms) and 'tone' is found within the answer.
'number' could be 'k' (K is an example) and 'k' is located in the answer.
'one?' could be 'a' and 'a' is found in the answer.
This explanation may well be incorrect...
'and' acts as a link.
Can you help me to learn more?
(Other definitions for get ones own back that I've seen before include "even the score?" , "do like The Avengers!" .)