First thing true love offered - some Crest (9)

I believe the answer is:

partridge

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

'first thing true love' is the definition.
I can't judge whether this defines the answer.

'some crest' is the wordplay.
'some' becomes 'part' (only part of something).
'crest' becomes 'ridge' (geographical term).
'part'+'ridge'='PARTRIDGE'

'offered' acts as a link.

Can you help me to learn more?

(Other definitions for partridge that I've seen before include "1st" , "Widespread bird" , "Animal" , "Peculiarly apt girder for the game bird" , "Flighty type" .)

I've seen this clue in The Independent.

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