Crossword Genius

First man to find a barrier (4)

Ross

I believe the answer is:

adam

'first man' is the definition.
(I've seen this before)

'a barrier' is the wordplay.
'barrier' becomes 'dam' (dam is a kind of barrier).
'a'+'dam'='ADAM'

'to find' is the link.

(Other definitions for adam that I've seen before include "first in the race?" , "First man in the Bible" , "First guy" , "Fellow" , "who transformed Palladian architecture?" .)

I've seen this clue in The Mirror.
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