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20a Sturdy bore hole contract into creases (4-4)
I have: ?E?L? - ?N?T
I can only think it may be WELL-KNIT but can't parse it.
7a Prepared to pad out material to capture in advance (9)
I have: ?R?R?C?R?

7 prerecord?
20 you are showing 5,4

20, I think "knit" can mean "contract", as in "knitting your brows", so forming creases in your forehead.
"Well knit" looks good.

20 Well Knit

Bore hole - Well
Contract into creases - Knit

https://en.oxforddictionaries.com/definition/us/well_knit

Thank you all