Old nuisance rising in crowd showing some bottle (8)
I believe the answer is:
jeroboam
'bottle' is the definition.
(jeroboam is a kind of bottle)
'old nuisance rising in crowd' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'nuisance' becomes 'bore' (I've seen this before).
'rising' says the letters should be written backwards (going up in a down clue).
'in' indicates putting letters inside.
'crowd' becomes 'jam' (jam is a kind of crowd**).
'o'+'bore'='obore'
'obore' reversed gives 'erobo'.
'erobo' going into 'jam' is 'JEROBOAM'.
'showing some' acts as a link.
(Other definitions for jeroboam that I've seen before include "'Large wine bottle, equal to four standard ones (8)'" , "Four-times bottle size" , "large sparkling container?" , "Ancient king" , "Four bottles of wine in one" .)