Gentle proposal (6)
I believe the answer is:
tender
I believe this is a double definition.
'gentle' is the first definition.
('tender' can be similar in meaning to 'gentle')
'proposal' is the second definition.
(thesaurus)
(Other definitions for tender that I've seen before include "not needing good teeth" , "facility for steam train" , "easily crushed" , "Painful to the touch" , "Gentle, affectionate" .)