The phrase "a hidden form of" is correct and usable in written English.
It can be used to describe something that is not immediately obvious or is concealed within another context or form.
Example: "The artist's work often reveals a hidden form of expression that challenges societal norms."
Alternatives: "a concealed type of" or "an obscure version of".
But they should recognize that tax expenditures are best viewed as a hidden form of spending.
Properly understood, however, it constitutes social policing, gender control, and – in its darker manifestations – a hidden form of social violence.
The CAP was also a transfer system from Germany to France, a hidden form of war reparations.
For millions still at work, hours were reduced, a hidden form of unemployment, and the average raise was less than enough to keep up with inflation.
Elephant tourism remains popular because it can be "a hidden form of cruelty", said Chiara Vitali, a wildlife expert at World Animal Protection.
The competition authorities are taking a hard look at Vivendi's new tax treatment to determine whether it is a hidden form of illegal state aid.
Pertinent examples of this approach are the seminal works of Eigen and Winkler-Oswatitsch [48], [49] about the reconstruction of early tRNA and a primordial gene in which they showed that nucleotide sequences existing today still carry, in a hidden form, the patterns of their ancestry.
Language pedants should ask themselves what really drives them in their policing efforts: genuine concern for sliding standards or a sinisterly hidden form of one-upmanship?
Here, vociferous complaints of canine faeces in the absence of actual evidence of high incidence indicated a more hidden form of distress or grievance that was better understood by examining its symbolic content, as well as its context.
Audits can't catch the amount of divergence caused by rehypothecation, since US GAAP requires both parties to record that they own the same rehypothecated asset as long as the borrower records a new dollar of debt against it that's why I refer to rehypothecation as an insidious, hidden form of leverage.
APVA is a serious and hidden form of domestic violence and abuse that is often not spoken about.
