Related Clues:

• After a century a matter of intelligence becomes a thorny matter
• It grows back in a first-class way with a couple of accountants
• This may blooming well turn first-rate for a couple of accountants (6)
• It makes an accountant somewhat prickly to join American intelligence
• That's a double century and a single A for a tree
• It takes twice a century for it to start to grow
• How an accountant may get planted on american intelligence
• Twice a century it starts to grow into a tree
• After a century, a tree comes to a finish of intelligence
• One C one C one A, all growing
• Twice with a hundred and one A grows up
• It takes at first a doubel century to grow this
• A blooming double century with a single A
• It grows for a century after a century to start with
• Two of a century with one of an A in the form of a tree