He needs no stamp (7)

I believe the answer is:

postman

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'he' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'no stamp' is the wordplay.
'no stamp' anagrams to 'POSTMAN'.
However, I am unsure how the anagram is indicated.

'needs' is the link.

Can you help me to learn more?

(Other definitions for postman that I've seen before include "Mail deliverer" , "Male mail carrier" , "one delivers" , "Male to deliver mail" , "Chap with letters" .)

I've seen this clue in The Irish Independent.

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