Complex sentence: Other people may wear a clip-on tie in lieu of a standard necktie if they do not know how to tie one, while others feel it is less constrictive than a standard necktie.
Split into simpler sentences: Other people may wear a clip-on tie in lieu of a standard necktie if they do not know how to tie one. Others may wear a clip-on necktie because it is less constrictive than a standard necktie.