Article on operating room? This is different (5)
I believe the answer is:
other
'different' is the definition.
(similar in meaning)
'article on operating room?' is the wordplay.
'article' becomes 'the' (the definite article in English).
'on' is an insertion indicator.
'operating room?' becomes 'or' (this might be a standard abbreviation I've not previously seen).
'the' put inside 'or' is 'OTHER'.
'this is' is the 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)" .)