watching out

out front

front runner

runner fell

fell purpose

(It's archaic, but it means evil or underhanded.  Thus the character, Dr Fell.

I do not like thee, Dr Fell.
The reason why I cannot tell.
But this one thing I know full well,
I do not like thee, Dr Fell.

Mum would sometimes take an instant dislike to someone and say "It's a Dr Fell feeling."

purpose full

full glass

glass ceiling

ceiling rose

rose garden

garden fence

fence off

off colour

colour sergeant

Sergeant Major