Answer:

lmno

Answer	Crossword Clue
LMNO	K-P connection
LMNO	K-P filler
LMNO	K-P filling

LMNO	K followers
LMNO	Pre-P queue
LMNO	K-P connectors
LMNO	KP sandwich?
LMNO	Alphabetic run
LMNO	Alphabet run
LMNO	Alphabetic sequence
LMNO	Letters after K

LMNO	Between k and p
LMNO	Between K and P
LMNO	Quartet that can't sing
LMNO	Alphabet quartet
LMNO	Rows before P
LMNO	K-P interval
LMNO	Middle of a run?
LMNO	Letters between K and P

LMNO	K-P linkup
LMNO	K-P link
LMNO	K-P hookup
LMNO	K-P interruptors
LMNO	Alphabetic quartet

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.