Bizarre marine mammal eating meat in hurry (7)
I believe the answer is:
surreal
'bizarre' is the definition.
(I've seen this in another clue)
'marine mammal eating meat in hurry' is the wordplay.
'marine mammal' becomes 'seal' (I've seen this before).
'eating' means one lot of letters goes inside another.
'meat in' says to take the centre (the 'meat' or 'guts' of the word).
The middle letters of 'hurry' are 'urr'.
'seal' placed around 'urr' is 'SURREAL'.
(Other definitions for surreal that I've seen before include "Odd" , "Like a dream" , "Dreamlike, irrational" , "Dreamlike - Dali-like" , "Involving fantastical imagery" .)