Where patient might go when heart's lost pulse (4)
I believe the answer is:
bean
'pulse' is the definition.
(I've seen this before)
'where patient might go when heart's lost' is the wordplay.
I cannot quite see how this works, but
'when' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
The remaining letters 'ban' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bean that I've seen before include "Seed of a leguminous plant" , "Pulse" , "Broad, French or kidney?" , "Seed of coffee plant" , "Seed of e.g. coffee" .)