Let it properly have a name (5)

I believe the answer is:

title

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

'a name' is the definition.
(I know that title is a type of call)

'let it properly' is the wordplay.
'let it' anagrams to 'TITLE'.
But, I'm unsure how the anagram is indicated.

'have' acts as a link.

Can you help me to learn more?

(Other definitions for title that I've seen before include "Legal possession" , "Right - name - rank" , "Book's name" , "Name - sign of rank" , "Right - name - address" .)

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

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