cos znalazlam:
(Biber et al)
6 verbs have variation between acting as a lexical verb with dummy 'do' and acting as operators themselves.
1.'do' construction...She doesn't have a dime
2.'have' as operator...I haven't a clue,...
Option 2 is a conservative (or even old-fashioned) choice. It occurs rarely in BrE conversation and almost never in AmE.
(The other verbs are: modal: have to, need, dare, used to, ought to.)