Crossword Genius

Making progress by crawling (8)

Ross

I believe the answer is:

swimming

I'm a little stuck... Click here to teach me more about this clue!

This might be a double definition.

'making progress' is the first definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

'crawling' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'by' is the link.

Can you help me to learn more?

(Other definitions for swimming that I've seen before include "Doing crawl" , "Bathing" , "Moving through water" , "Travelling through water" , "Filled with tears" .)

I've seen this clue in The Globe and Mail.
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