Bat showing determination on old wicket (6)
I believe the answer is:
willow
'bat' is the definition.
(I've seen this before)
'determination on old wicket' is the wordplay.
'determination' becomes 'will' (will can mean determination or desire).
'on' says to put letters next to each other.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'wicket' becomes 'w'.
'will'+'o'+'w'='WILLOW'
'showing' is the link.
(Other definitions for willow that I've seen before include "Sally tree" , "Pussy- - -" , "It produces osiers" , "See 22" , ""Weeping" tree" .)