Answer:

fir

Answer	Crossword Clue
FIR	Coniferous tree
FIR	Cone maker
FIR	Douglas, for one

FIR	Christmas tree type
FIR	Cone producer
FIR	Douglas, e.g.
FIR	Cone-bearing tree
FIR	Flat-needled tree
FIR	Yuletide tree
FIR	Yuletide tree choice
FIR	Evergreen type

FIR	Evergreen
FIR	Balsam source
FIR	Christmas-tree choice
FIR	Popular Christmas tree
FIR	Cedar relative
FIR	Certain needle dropper
FIR	Holiday buy
FIR	Holiday tree

FIR	Needle source
FIR	Needle producer
FIR	Cone bearer
FIR	Needle bearer
FIR	Pine family tree
FIR	Certain evergreen
FIR	Christmas tree
FIR	Spruce cousin

FIR	A train might circle one
FIR	Douglas ..
FIR	Plywood wood
FIR	Needle dropper
FIR	Tree with lights, often
FIR	Fraser or Douglas
FIR	Needle holder
FIR	Christmas tree choice

FIR	Cone dropper
FIR	Cedar kin
FIR	Christmas buy
FIR	Christmas choice
FIR	Tree often brought into the house