Rick and Jenny's child? (6)
I believe the answer is:
wrench
'rick' is the definition.
(I know that rick can be written as wrench)
'jenny's child?' is the wordplay.
'jenny' becomes 'wren' (jenny wren is another name for a wren).
'child?' becomes 'ch' (abbreviation for child).
'wren'+'ch'='WRENCH'
'and' acts as a link.
(Other definitions for wrench that I've seen before include "Type of spanner" , "Sprain - difficult parting" , "Yank" , "Twisting tool" , "Tear away" .)