Bean perhaps showing vital sign (5)
I believe the answer is:
pulse
This could be a double definition.
'bean' is the first definition.
(I know that bean can be written as pulse)
'vital sign' is the second definition.
(I've seen this in another clue)
'perhaps showing' is the link.
This may not be right. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for pulse that I've seen before include "It beats - peas and beans" , "When you're gone, you haven't one" , "Arterial throb" , "A general opinion" , "Regular rhythm" .)