Virginia takes cover - as is logical (5)
I believe the answer is:
valid
'is logical' is the definition.
(similar in meaning)
'virginia takes cover' is the wordplay.
'virginia' becomes 'va' (US state abbreviation).
'takes' means one lot of letters go next to another.
'cover' becomes 'lid' (lid is a kind of cover).
'va'+'lid'='VALID'
'as' acts as a link.
(Other definitions for valid that I've seen before include "Legally acceptable and sound" , "Sound, well-based" , "Well-founded" , "Legally accepted or logical" , "Legally good" .)