Sort of lynx bishop caught in seagoing vessel (6)
I believe the answer is:
bobcat
'sort of lynx' is the definition.
'bishop caught in seagoing vessel' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'caught' becomes 'c' (cricket abbreviation).
'in' is an insertion indicator.
'seagoing vessel' becomes 'boat'.
'b'+'c'='bc'
'bc' inserted inside 'boat' is 'BOBCAT'.
(Other definitions for bobcat that I've seen before include "Small N American lynx" , "Small lynx of Norht America" , "Relation of the lynx" , "A sort of lynx" , "Kind of lynx" .)