Answer: underwrite

AnswerCrossword Clue
UNDERWRITESubscribe to.
underwriteWrite (something) below something else, esp. other written matter
underwriteAccept (a liability or risk) in this way
underwriteto write under or at the end of something else
underwriteSign and accept liability under (an insurance policy), thus guaranteeing payment in case loss or damage occurs
underwrite(of a bank or other financial institution) Engage to buy all the unsold shares in (an issue of new securities)
underwriteUndertake to finance or otherwise support or guarantee (something)