Working American president touring capital of Louisiana (6)
I believe the answer is:
usable
'working' is the definition.
(I've seen this before)
'american president touring capital of louisiana' is the wordplay.
'american' becomes 'us' (abbreviation for United States).
'president' becomes 'abe' (Abraham (Abe) Lincoln).
'touring' is an insertion indicator (touring can mean going round).
'capital of' says to take the initial letters.
The first letter of 'louisiana' is 'l'.
'abe' enclosing 'l' is 'able'.
'us'+'able'='USABLE'
(Other definitions for usable that I've seen before include "Able to be utilised" , "Fit for purpose" , "Fit for employment" , "Practical" , "Functioning" .)