Liberal Democrat capturing heart of Tory PM, or other official (4,5)

I believe the answer is:

lord mayor

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

'other official' is the definition.
'lord mayor' can be an answer for 'official' (I've seen this before). I'm unsure of the 'other' bit.

'liberal democrat capturing heart of tory pm or' is the wordplay.
'liberal democrat' becomes 'LD' (common abbreviation used in UK politics).
'capturing' means one lot of letters goes inside another.
'heart of' indicates the central letters.
'pm' becomes 'May' (former UK prime minister Theresa May).
The centre of 'tory' is 'or'.
'ld' going around 'or' is 'lord'.
'lord'+'may'+'or'='LORD MAYOR'

Can you help me to learn more?

(Other definitions for lord mayor that I've seen before include "Local dignitary" , "head for city" , "elected as this?" , "Civic dignitary" , "city position" .)

I've seen this clue in The Telegraph.

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