Answer:

conf

Answer	Crossword Clue
CONF	Big meeting: Abbr.
CONF	A CEO may call one
CONF	Type of call: Abbr.

CONF	Part of NFC: Abbr.
CONF	Sports div.
CONF	Meeting (abbr.)
CONF	Gp. business call
CONF	Part of CSA
CONF	Kind of call: Abbr.
CONF	Mtg.
CONF	NCAA division

CONF	Meeting: abbr.
CONF	Business meeting: Abbr.
CONF	Athletic assoc.
CONF	Part of the N.C.A.A.'s purview: Abbr.
CONF	Assn. of teams