I'll give you the definition give me the word. (TIP: ALL THE BLANKS ARE CONSONANTS)
1)A person or organisation that buys things from a company --IE--
2)This describes working hours that are not fixed and can change --E-I--E
3)the property (building,etc) of a company --E-I-E-
4) a person who has written a letter asking for a job A---I-A--
Thank You :D

Consumer
Flexible
Assets
Wannabe

LanyaOsman,
First welcome to this beautiful site. My replies are as follows -

1. Client
2. Flexible
3. Premises
4. Applicant