I hamper arrangement made for Joseph's son (7)

I believe the answer is:

ephraim

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'for joseph's son' is the definition.
I can't tell whether this definition defines the answer.

'i hamper arrangement' is the wordplay.
'arrangement' indicates anagramming the letters.
'i'+'hamper'='ihamper'
'ihamper' is an anagram of 'EPHRAIM'.

'made' is the link.

Can you help me to learn more?

(Other definitions for ephraim that I've seen before include "Joseph's lad" , "Biblical people" , "tribe" .)

I've seen this clue in The Globe and Mail.

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