Degree secured by US lexicographer, developer of online site (9)

I believe the answer is:

webmaster

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'developer of online site' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'degree secured by us lexicographer' is the wordplay.
'degree' becomes 'MA' (Master of Arts is a type of degree).
'secured by' means one lot of letters goes inside another (inserted letters are held or secured).
'us lexicographer' becomes 'webster' (I've seen this before).
'ma' going inside 'webster' is 'WEBMASTER'.

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(Other definitions for webmaster that I've seen before include "site manager" , "who manages online facility" .)

I've seen this clue in The Telegraph.

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