Tidy men finally have a meal (4)
I believe the answer is:
neat
'tidy' is the definition.
(similar in meaning)
'men finally have a meal' is the wordplay.
'finally' indicates one should take the final letters.
'have a meal' becomes 'eat' (I've seen this before).
The final letter of 'men' is 'n'.
'n'+'eat'='NEAT'
(Other definitions for neat that I've seen before include "Well-trimmed" , "Trim - tidy - without water" , "Tidy, well-ordered" , "without water being added" , "Tidy - undiluted" .)