Top journalist has right old time climbing (6)
I believe the answer is:
editor
'top journalist' is the definition.
(I've seen this before)
'right old time climbing' is the wordplay.
'right' becomes 'r' (common abbreviation).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'time' becomes 'tide' (**).
'climbing' shows that the letters should be reversed in order (in a down clue, letters climb up).
'r'+'o'+'tide'='rotide'
'rotide' back-to-front is 'EDITOR'.
'has' is the link.
(Other definitions for editor that I've seen before include "Head of a newspaper say" , "Press boss" , "Person in charge of a publication" , "Person in charge of newspaper" , "Director of newspaper" .)