Valid (4)
'valid' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for logical that I've seen before include "clear" , "Using reason" , "Based on reason" , "According with reason" , "Well reasoned" .)
'valid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for true that I've seen before include "Accurate, factual" , "Honest - expression of agreement" , "Agreeing with fact or reality" , "Real; accurate" , "Straight or correct" .)
'valid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for sound that I've seen before include "Health - noise" , "Fathom" , "place for sailing, perhaps" , "Financially stable" , "Safe" .)
'valid' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for legitimate that I've seen before include "Genuine" , "Within the rules" , "authorised" , "Lawful" , "Kosher" .)