Correct! Prodigal Daughter is the episode. I see that I messed up the numbering of the clues. Here is the list of clues and explanations:
Clue #1: beverage & a meal--O'Brien gets a warm meal at Tigan home.
Clue #2: under pressure--Mining company is being pressured by the Orion Syndicate.
Clue #3: rising cost--Payment to Morica Bilby increases.
Clue #4: possible sabotage--Part for drill is mislabeled.
Clue #5: unhelpful authorities--O'Brien tried to find out about Morica but could not get information from autorities on New Sydney.
Clues #6 & #7: missing person--O'Brien goes missing trying to find Morica who was missing.
Clue #8: gag on gagh--Ezri Dax does not like gagh.
Your turn, Holly-deck One.