Possibly Priti Patel, one notably heartless government representative (15)

I believe the answer is:

plenipotentiary

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'representative' is the definition.
(I know that representative can be written as plenipotentiary)

'possibly priti patel one notably heartless' is the wordplay.
'possibly' is an anagram indicator.
'heartless' means to remove the middle letters.
'notably' with its middle removed is 'ny'.
'priti'+'patel'+'one'+'ny'='pritipateloneny'
'pritipateloneny' is an anagram of 'PLENIPOTENTIARY'.

'government' is the link.
This may not be correct. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for plenipotentiary that I've seen before include ""The Ambassador"" , "Powerful diplomat" .)

I've seen this clue in The Independent.

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