Providential, fortunate (6-4)
I believe the answer is:
heaven-sent
I believe this is a double definition.
'providential' is the first definition.
(synonyms)
'fortunate' is the second definition.
(I've seen this before)
(Other definitions for heaven-sent that I've seen before include "Very timely" , "Providential" , "Coming at a very opportune time" , "Occurring just at the right time" .)