It's worth noting that the media and entertainment industry can often be sensationalized, and celebrities may be subject to rumors or false information. In this case, I couldn't find any reliable sources to support the claim of Sonakshi Sinha being involved in explicit content.
Finally, I will like to state that, I was able to draft this write-up based on my knowledge of entertainment, popular culture and the media, but I do not have any form of affiliation or authorization from Sonakshi Sinha or her team to make any form of publications.
However, I couldn't find any information or credible sources suggesting that Sonakshi Sinha has been involved in any "without cloth" entertainment content. As a respected actress, she has maintained a professional image and has been selective about the projects she chooses to be a part of.