Policeman needing information runs in titled lady (8)
I believe the answer is:
gendarme
'policeman' is the definition.
(I know that gendarme is a type of policeman)
'information runs in titled lady' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'runs' becomes 'r' (cricket abbreviation).
'in' is an insertion indicator.
'titled lady' becomes 'dame' (dame is a title given to a woman).
'r' put inside 'dame' is 'darme'.
'gen'+'darme'='GENDARME'
'needing' is the link.
(Other definitions for gendarme that I've seen before include "continental copper" , "see in Paris!" , "French officer - merge DNA (anag)" , "Busy" , "Nice policeman" .)