The phrase "devoted to a cause" is correct and usable in written English.
You can use it when you want to describe someone or something who has been dedicated to an important cause. For example, "He was a brave soldier devoted to the cause of freedom and justice."
Indeed, what we usually think of as the right reason may simply be the most obvious reason from the perspective of people who are devoted to a cause.
A believer in constitutional reform, not radical overturn, Weber insisted that the politician must be devoted to a cause yet attentive to the practical consequences of his actions.
According to Issacharoff, "Lujan was the first big case that said, Just because you are really devoted to a cause like the environment, that doesn't mean we are going to let you into the courthouse".
Maybe the outcome would have been the same regardless — John spontaneous and volatile and artistically irresistible, and Patrick more circumspect, the patient one, less demanding of perfection but perhaps more devoted to a cause.
One of the new album's tracks, "Sing," is directly devoted to a cause: the treatment of pregnant women with AIDS to prevent the spread of H.I.V. to their babies.
Iosif Kobzon, a Russian legislator who met the terrorists to negotiate on Thursday, described them as educated and relatively polite, but also compared them to Hitler Youth -- fanatically devoted to a cause.
You may have a job, children, a disability, et cetera, that limit the amount of time you can devote to a cause.
Neglected-ness is a measure of how many resources are currently devoted to a particular cause.
In team sports, moreover, our hero will have been seen in constant altruism, his magisterial qualities devoted to a common cause.
But the NRA is a well-funded membership operation devoted to a single cause — guns — and unlikely to be moved by the actions of companies with which it has such loose and peripheral ties.
E-mails show that, a year into the contract, the company suggested it might collaborate with McDougal on a skin-care line and a documentary devoted to a medical cause that she cares about, neither of which has come about.
