Allow plenty of time. A good application always takes longer than you expect.
Show how in the past you used the skill similarly to how it will be used in the role you now seek.
For example, the skill 'professional oral communication skills' is general. Consider how the role will require you to use that skill. Will you be negotiating with clients? Explaining policy? Training others? Making presentations to groups?
Tips:
In very competitive fields - for example, performing arts, publishing and journalism, advertised vacancies can be very rare. As part of your job search strategy, plan also to make speculative applications, also known as cold calling.
Use this technique for organisations:
Many vacancies may be filled by people who are already working in the area in a lower position or in a voluntary capacity. Demonstrate how keen you are by initiating contact.
As there is no advertisement, you need to think about why the organisation should want you, what you have to offer and in some cases, why they should create a vacancy for you.