Here are the possible solutions for they have legal life of 17 years clue
Answer
Clue
Relevancy
patents
Clue
They have legal life of 17 years.
Definition
PATENT, to obtain a patent (a government grant protecting the rights of an inventor) on
ages
Clue
Years and years and years
Definition
AGE, to grow old
eon
Clue
Years and years and years
Definition
a long period of time, also AEON
eons
Clue
Years and years and years
Definition
EON, a long period of time, also AEON
newt
Clue
Gingrich who said "females have biological problems staying in a ditch for thirty days because they get infections and they don't have upper body strength"
Definition
a tailed amphibian of the salamander family, also EWT
oslo
Clue
City I visited after I was runner-up for the Nobel Prize in literature; they'll realize I should have won in ten years
lend
Clue
Give someone a book that they'll "give back to you when they're done reading," as I did with "The Wind-Up Bird Chronicle" over three years ago
Definition
to give for a time only
rhett
Clue
"Never, at any crisis of your life, have I known you to have a handkerchief" speaker