Left in charge, journo finally produces series of columns (7)
I believe the answer is:
portico
'series of columns' is the definition.
(I've seen this before)
'left in charge journo finally' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'finally' indicates one should take the final letters.
The last letter of 'journo' is 'o'.
'port'+'ic'+'o'='PORTICO'
'produces' is the link.
(Other definitions for portico that I've seen before include "Grand porch" , "Covered porch, perhaps with columns" , "Colonnade, covered porch" , "Elaborate porch" , "Covered walkway" .)