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"To perform a hymn" can be replaced with "sing", knitting technique is "purling", wikipedia will have something on that, Note the 'about', this is an instruction to wrap "sing" about "purl". Another word for "street" is "road" hence "s-purl-ing road", first letter 8 letters, second 4 letters.
Crossword clues have a lot of instruction words, like 'about', 'sounds like', "One", "Capital" all requiring a particular operation.
I got the purl bit but annoyingly failed to wrap sing around it...
S-purl-ing