The most common and most likely answer to this crossword clue is the 10 letter word PLASTERING
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Buddy explains!

The straight part
We know that "doing home repairs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case doing home repairs = plastering.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PLASTERING mean?
PLASTERING verb- To cover or coat something with plaster; to render.
- To apply a plaster to.
- To smear with some viscous or liquid substance.
- To hide or cover up, as if with plaster; to cover thickly.
- To smooth over.
- The act or process of overlaying with plaster.
- A covering of plaster; plasterwork.