Taste blood after gatecrashing media function (6)
I believe the answer is:
liking
'taste' is the definition.
(I've seen this in another clue)
'blood after gatecrashing media function' is the wordplay.
'blood' becomes 'kin' (both can mean one's family).
'after gatecrashing' is an insertion indicator (inserted letters gatecrash their way into the word).
'media function' becomes 'lig' (a lig is a party held for publicity).
'kin' put inside 'lig' is 'LIKING'.
(Other definitions for liking that I've seen before include "Fondness (for thing)" , "A feeling of regard or fondness" , "Happy about" , "Being in favour (of)" , "weakness" .)