Suitable work left on board with a Parisienne (9)
I believe the answer is:
opportune
'suitable' is the definition.
(thesaurus)
'work left on board with a parisienne' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'left on board' becomes 'port' (port is left on board a ship).
'with' says to put letters next to each other.
'a parisienne' becomes 'une'.
'op'+'port'+'une'='OPPORTUNE'
(Other definitions for opportune that I've seen before include "in place" , "Appropriate" , "Occurring at a fitting time" , "Well-timed" , "Especially convenient" .)