Sweetheart with partner harbouring a new issue (7)

I believe the answer is:

emanate

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'new issue' is the definition.
'emanate' can be an answer for 'issue' (thesaurus). I'm not certain of the 'new' bit.

'sweetheart with partner harbouring a' is the wordplay.
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'with' means one lot of letters go next to another.
'partner' becomes 'mate' ('mate' can be a synonym of 'partner'**).
'harbouring' is an insertion indicator.
'a' becomes 'an'.
'mate' placed around 'an' is 'manate'.
'e'+'manate'='EMANATE'

Can you help me to learn more?

(Other definitions for emanate that I've seen before include "Rise" , "Flow or proceed from" , "Emerge or originate" , "Come out (of source)" , "Proceed or issue forth" .)

I've seen this clue in The Telegraph.

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