Retracted part of wife's lupin -- its seed, for example (5)

I believe the answer is:

pulse

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'seed for example' is the definition.
'pulse' can be an answer for 'seed' (I've seen this before). I'm unsure of the 'for example' bit.

'retracted part of wife's lupin its' is the wordplay.
'retracted' is a reversal indicator.
'part of' indicates a hidden word.
'eslup' is hidden in the letters of 'wifes lupin its'.
'eslup' backwards is 'PULSE'.

Can you help me to learn more?

(Other definitions for pulse that I've seen before include "Bean - throb" , "Vitality" , "Heartbeat; legume" , "Musical beat; edible seeds" , "Rhythmic beat" .)

I've seen this clue in The Independent.

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