Short jumper? Daughter's cross (4)
I believe the answer is:
rood
'cross' is the definition.
(term for a crucifix)
'short jumper? daughter's' is the wordplay.
'short jumper?' becomes 'roo' (short for kangaroo, something which jumps; 'short' suggests an abbreviation).
'daughter' becomes 'd' (genealogical abbreviation).
'roo'+'d'='ROOD'
(Other definitions for rood that I've seen before include "old piece of land" , "Pole, perch or crucifix" , "Crucifix in entrance, set back" , "Crucifix in church; one quarter of an acre" , "Crucifix on part of an acre" .)