Dealt with it, using serrated blade on tomato skin (3,2)
I believe the answer is:
saw to
'dealt with it' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Maybe you can see an association between them that I can't see?
'serrated blade on tomato skin' is the wordplay.
'serrated blade' becomes 'saw' (I've seen this in another clue).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'skin' means to remove the middle letters (only the skin or outside of the word is used).
'tomato' with its centre removed is 'to'.
'saw'+'to'='SAW TO'
'using' acts as a link.
Can you help me to learn more?