Companion poorly – no pulse (4,3)

I believe the answer is:

plus one

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'companion' is the definition.
I know nothing about this answer so I can't tell whether this works.

'poorly no pulse' is the wordplay.
'poorly' indicates anagramming the letters (a poor spelling).
'no'+'pulse'='nopulse'
'nopulse' with letters rearranged gives 'PLUS-ONE'.

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