Lord if plastered is fussy (6)

I believe the answer is:

florid

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'fussy' is the definition.
(thesaurus)

'lord if plastered' is the wordplay.
'lord if' anagrams to 'FLORID'.
However, I'm unsure how the anagram is indicated.

'is' acts as a link.

Can you help me to learn more?

(Other definitions for florid that I've seen before include "Ruddy, flushed" , "Red in the face" , "Excessively ornamented" , "Excessively ornate" , "Using unusual words" .)

I've seen this clue in The Sun.

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