Turn up after father gets jumper (4)
I believe the answer is:
frog
'jumper' is the definition.
(thesaurus)
'turn up after father' is the wordplay.
'turn' becomes 'go' (a person's move in a board game**).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'after' is a charade indicator (letters next to each other).
'father' becomes 'fr'.
'go' reversed gives 'og'.
'og' after 'fr' is 'FROG'.
'gets' is the link.
(Other definitions for frog that I've seen before include "Small creature" , "eg Kermit" , "Amphibious jumper" , "One of Ranidae" , "Amphibious hopper" .)