Linger, lurk (6)
I believe the answer is:
loiter
I believe this is a double definition.
'linger' is the first definition.
(I know that linger can be written as loiter)
'lurk' is the second definition.
(synonyms)
(Other definitions for loiter that I've seen before include "Linger aimlessly" , "Hang about idly" , "Wait suspiciously" , "Linger, tarry" , "Stand around idly" .)