One who is bound to tell tale about leader of government being overwhelmed by honour (7)

'one who is bound' is the definition.
The definition suggests a singular noun which matches the answer.

'tell tale about leader of government being overwhelmed by honour' is the wordplay.
'tell tale' becomes 'lie' (telling tales means lying).
'about' is an insertion indicator.
'leader of' says to take the initial letters.
'being overwhelmed by' means one lot of letters goes inside another (inserted letters get absorbed or overwhelmed).
'honour' becomes 'obe' (Order of the British Empire award).
The first letter of 'government' is 'g'.
'lie' placed around 'g' is 'lige'.
'lige' put into 'obe' is 'OBLIGEE'.

'to' is the link.

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