Jaguar perhaps bounds half-hidden, pursuing one deer (7)
I believe the answer is:
caribou
'deer' is the definition.
(caribou is a kind of deer)
'jaguar perhaps bounds half-hidden pursuing one' is the wordplay.
'jaguar perhaps' becomes 'car' (Jaguar is a brand of car).
'half-hidden' means to take half the letters.
'pursuing' says to put letters next to each other.
'one' becomes 'i' (roman numeral).
'bounds' cut in half is 'bou'.
'bou' put after 'i' is 'ibou'.
'car'+'ibou'='CARIBOU'
(Other definitions for caribou that I've seen before include "Arctic beast" , "North American Arctic deer" , "Ruminant" , "Wild animal" , "Arctic deer with large antlers" .)