Flatter, Praise Someone for One's Own Gain
This page is the CodyCross answer for the clue below from Train Travel, Group 706, Puzzle 1 (Elbow and Legroom).
Question is: Flatter, Praise Someone for One's Own Gain
and the answer is: BUTTERUP
Word Meaning:
BUTTER UP — (transitive, figuratively, informal) To flatter, especially with the intent of personal gain.
Definitions from Wiktionary.