Help Please!!

[TiffanySue]

1 d A horse that's used to ups and downs (13)
7d. Forcing people to accept a faith - or only pretending (6,7)

[hc4361]

1d Steeplechaser?

[Sipowicz]

Steeplechaser?

[Mamyalynne]

7 making believe

[TiffanySue]

And need help for these please.
22 a Looks at messages of greeting (7)
17d Transmitting signal - or could it be a calling card (4-4)
5d Takes out literary quotations (8)

[scorpiojo]

5 Extracts

[scorpiojo]

22 Regards?

[TiffanySue]

Thank you.