Answer:

sparringpartner

Answer	Crossword Clue
SPARRINGPARTNER	Title bout help
SPARRINGPARTNER	One's mate in amicable wrangling.
SPARRINGPARTNER	Punching bag of a sort

SPARRINGPARTNER	Rowing mate
SPARRINGPARTNER	Puncher
SPARRINGPARTNER	Training camp figure
SPARRINGPARTNER	One engaged in friendly contention