Love people to make a sign (4)
I believe the answer is:
omen
'a sign' is the definition.
(omen is a kind of sign)
'love people' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'people' becomes 'men' (men are people).
'o'+'men'='OMEN'
'to make' is the link.
(Other definitions for omen that I've seen before include "Prognostication" , "Prophetic significance" , "Forewarning, harbinger" , "Forecast" , "Portent, prophetic sign" .)