Military Engineering Services special dining facility (4)
I believe the answer is:
mess
'dining facility' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'military engineering services special' is the wordplay.
'military engineering services' becomes 'mes' (this might be a standard abbreviation of which I'm unaware).
'special' becomes 's' (common abbreviation as in Special Air Service).
'mes'+'s'='MESS'
Can you help me to learn more?
(Other definitions for mess that I've seen before include "pickle" , "Meal" , "Disagreeable mixture" , "dog's dinner" , "Disorderly state" .)