Article on operating room? This is different (5)
I believe the answer is:
other
'is different' is the definition.
(similar in meaning)
'article on operating room?' is the wordplay.
'article' becomes 'the' (the definite article).
'on' indicates putting letters inside.
'operating room?' becomes 'or' (this might be a standard abbreviation which I don't know about).
'the' put within 'or' is 'OTHER'.
'this' acts as a link.
Can you help me to learn more?
(Other definitions for other that I've seen before include "Different, disparate" , "Alternate; additional" , "Throe (anag)" , "Different, alternative" , "Different (from those mentioned)" .)