In which suspect is to linger? (10)
I believe the answer is:
'in' is the definition.
I know nothing about this answer so I can't judge whether this works.
'suspect is to linger?' is the wordplay.
'suspect' indicates an anagram.
'istolinger' is an anagram of 'LOITERINGS'.
'which' is the link.
Can you help me to learn more?