The Einstein boys (6)
I believe the answer is:
albert
'the einstein' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for albert that I've seen before include "Einstein or Schweitzer?" , "Kind of watch chain" , "Prince with 24" , "Queen Victoria's consort or familiar ex-Taoiseach" , "Old watch chain" .)