Understanding perfume
What makes a perfume smell clean
Clean in perfume describes an association such as fresh laundry, soap, airy flowers or crisp citrus. It is separate from the regulatory or marketing use of clean to describe ingredients, and it does not establish a safety claim.
A HUME Fragrance buying guide

Name your clean reference
Laundry-like softness, soapy brightness and citrus freshness can feel different. Use the familiar smell you want rather than assuming clean describes one universal fragrance.
Consider the complete structure
Musky, floral and citrus effects can contribute to a clean impression in different combinations. A single listed note cannot guarantee that you will perceive the finished scent that way.
Separate smell and product claims
A clean-smelling perfume is not automatically natural, hypoallergenic or free of a particular material. Check actual labels and verified documentation for ingredient questions.
Try this before you buy
Finish the sentence: by clean, I mean it reminds me of ____, rather than ____.