15d. People who obtain information with an effort (6) G?????
20a. An earnest position to take meals in the lobby (8) E?????T? (could be (E?E?I?T?) but not certain about other words.
22a. There's bound to be good reason for such a sale (7,6) ?????T?-????A?
18a. Fine stuff for walking on in summer!(4) no letters
19d. Bill and he might need a doctor, apparently (4) no letters