Checks out The Hearing with old Count briefly where there's capacity (8)
I believe the answer is:
otoscope
'checks out the hearing with old count briefly' is the definition.
I can't tell whether this definition defines the answer.
'there's capacity' is the wordplay.
'there's' becomes 'oto' (I can't explain this - if you can you should believe this answer much more).
'capacity' becomes 'scope' (I've seen this before).
'oto'+'scope'='OTOSCOPE'
'where' is the link.
Can you help me to learn more?
(Other definitions for otoscope that I've seen before include "Instrument for visual examination of an ear" , "Ear examination equipment" , "medical equipment" , "Ear examiner" , "It's used to examine 27 ac" .)