IHOP

Set to 45 different clues across 52 published puzzles, most often “Blue-roofed chain” — The New York Times, Saturday, 6 August 2011.

4 letters

Every clue on record, most used first

Blue-roofed chain2 times
The New York Times — Saturday, 6 August 2011
Chain with many links2 times
The New York Times — Saturday, 28 August 2010
Denny's competitor2 times
The New York Times — Wednesday, 7 July 2010
Restaurant chain acronym2 times
The New York Times — Wednesday, 17 October 2007
Restaurant acronym2 times
The New York Times — Monday, 11 June 2007
Denny's alternative2 times
The New York Times — Sunday, 22 April 2007
Breakfast restaurant chain2 times
The New York Times — Monday, 26 April 2004
Place to order a stack, sayonce
The New York Times — Wednesday, 29 June 2011
Sister co. of Applebee'sonce
The New York Times — Friday, 4 February 2011
Breakfast place that's often open 24 hrs.once
The New York Times — Tuesday, 26 October 2010
Stack-serving chain, for shortonce
The New York Times — Tuesday, 27 July 2010
Flapjack eatery, for shortonce
The New York Times — Tuesday, 13 January 2009