How to massively remove a word from a file name in Linux using a mask?

Question

linux

There are files in the same directory:
file CLEAR.test
file1 CLEAR.test
file2 CLEAR.test
...

How to turn them in the terminal into:
file.test
file1.test
file2.test

Answer 1

Klats and
Klats
Like this

user:TEST/ $ ls -1
#-- output--
file CLEAR.test
file1 CLEAR.test
file2 CLEAR.test

user:TEST/ $ rename 's/ CLEAR//g' *.test
                           
user:TEST/ $ ls -1                                                
#--output--
file.test
file1.test
file2.test