Large popular German wanting seconds hangs around (7)
I believe the answer is:
lingers
'hangs around' is the definition.
('linger' can be a synonym of 'hang around')
'large popular german wanting seconds' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'popular' becomes 'in' ('in' can mean trendy).
'german' becomes 'ger' (abbreviation).
'wanting' says to put letters next to each other.
'seconds' becomes 's' (abbreviation).
'l'+'in'+'ger'+'s'='LINGERS'
(Other definitions for lingers that I've seen before include "Dallies" , "hangs around in hope" , "Dawdles" , "Hangs on, prolongs leave-taking" , "Leaves slowly and hesitantly" .)