There is a paragraph on this on page viii of the ExecSum. Basically the FBI was not going to say anything about it at all but Stuart Evans forced them to include a generic statement: Due to Evans's persistent inquiries, the FISA application also included a footnote, developed by OI based on information provided by the Crossfire Hurricane team, to address Evans's concern about the potential political bias of Steele's research. The footnote stated that Steele was hi red by an identified U.S. person (Glenn Simpson) to conduct research regarding "Candidate #l's" (Donald Trump) ties to Russia and that the FBI "speculates" that this U.S. person was likely looking for information that could be used to discredit the Trump campaign. So all they said was it came from Glenn Simpson. There was no information that Simpson was hired by the Clinton campaign.