Francis’s place briefly to help one (6)
I believe the answer is:
assisi
'francis's place' is the definition.
(as in St Francis of Assisi)
'briefly to help one' is the wordplay.
'briefly' means to remove the last letter.
'to help' becomes 'assist' (assisting is a kind of helping).
'one' becomes 'i' (Roman numeral).
'assist' with its final letter taken away is 'assis'.
'assis'+'i'='ASSISI'
(Other definitions for assisi that I've seen before include "town, in Italy" , "saint from here" , "St Francis's city" , "Home town of St Francis" , "St Francis's town" .)