Man's a biochemist (4)

I believe the answer is:

adam

I'm a little stuck... Click here to teach me more about this clue!

'man's' is the definition.
(man's name)

'a biochemist' is the wordplay.
'biochemist' becomes 'dam' (I can't explain this - if you can you should believe this answer much more).
'a'+'dam'='ADAM'

Can you help me to learn more?

(Other definitions for adam that I've seen before include "Man No. 1" , "neoclassical style" , "God's first son" , "father figure" , "the first orphan?" .)

I've seen this clue in the Sydney Morning Herald.

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