I’ll be round in a minute (6,4)
I believe the answer is:
second hand
'i'll' is the definition.
I can't judge whether this definition defines the answer.
'round in a minute' is the wordplay.
I cannot quite understand how this works, but
'round' could be 'hand' (I have seen 'Round of applause ' mean 'hand' so perhaps 'round' could also mean 'hand') and 'hand' is found in the answer.
'minute' could be 'second' (synonyms) and 'second' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'be' is the link.
Can you help me to learn more?
(Other definitions for second hand that I've seen before include "going quickly on the clock?" , "Previously owned - part of watch" , "Watch component" , "not original" , "being employed again" .)