Identical (4)
'identical' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for same that I've seen before include "uniform" , "Equal in amount or value" , "Ditto" , "If - be the food of love, play on (Twelfth Night)" , "Aforesaid" .)
'identical' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for equal that I've seen before include "Alike" , "more or less" , "What = means" , "Identical, add up to" , "Evenly-matched" .)
'identical' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alike that I've seen before include "twins, perhaps" , "In a similar way" , "uniform" , "Undistinguished" , "possessing similar characteristics" .)
'identical' is the definition.
(I know that identical can be written as selfsame)
This is the entire clue.
(Other definitions for selfsame that I've seen before include "Exactly identical" , "The identical kind, not changed or different" .)
'identical' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for matching that I've seen before include "Designedly compatible" , "Corresponding" , "Co-ordinated in pattern or colour, say" .)