Bowling in the middle overs is a grey area for us.

Source: https://indianexpress.com/article/sports/cricket-world-cup/intikhab-alam-says-babar-azam-must-quit-captaincy-there-is-no-shame-in-doing-so-8993650/

Circumventing the great firewall is a legally grey area in China.

Source: https://tech.slashdot.org/story/23/10/09/2056239/chinese-programmer-ordered-to-pay-1-million-yuan-for-using-vpn?utm_source=rss1.0mainlinkanon&utm_medium=feed

It's been a bit of a grey area, because council must approve paints used in the town's conservation area.

Source: https://www.northerndailyleader.com.au/story/8294459/mayors-golden-opportunity-to-prove-black-is-a-heritage-colour/?src=rss

"There is some outdoor furniture but it's a bit of a grey area around insurance responsibilities if anything happens on the street," Cr Nelmes said.

Source: https://www.newcastleherald.com.au/story/8367335/council-weighs-up-7000-fee-for-leaving-dining-furniture-outside-overnight/?src=rss

To deal with this murky and grey area, the phrase tries to take that middle ground.

Source: https://www.forbes.com/sites/lanceeliot/2023/04/08/that-nonsense-of-chatgpt-being-called-an-alien-intelligence-is-wacky-and-out-of-this-world-says-ai-ethics-and-ai-law/

US law enforcement agencies have struggled to respond because much of the censorship and harassment occurs in a legal grey area.

Source: https://www.spectator.com.au/2023/04/china-and-hong-kong-a-tale-of-caution/