Miss niece occasionally meeting daughter (4)
I believe the answer is:
need
'miss' is the definition.
(I've seen this before)
'niece occasionally meeting daughter' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'meeting' says to put letters next to each other.
'daughter' becomes 'd' (genealogical abbreviation).
The alternate letters of 'niece' are 'nee'.
'nee'+'d'='NEED'
(Other definitions for need that I've seen before include "must have results!" , "Cry out for - prerequisite" , "Require (as essential)" , "state requiring relief" , "Want - require(ment)" .)