Fat cat abandoned by banks poised to be banged up (7)
I believe the answer is:
adipose
'fat' is the definition.
(similar in meaning)
'cat abandoned by banks poised to be banged up' is the wordplay.
'abandoned by banks' means to look at the middle letters (the edge letters or \'banks\' are removed).
'to be banged up' indicates an anagram (I've seen this in other clues).
The middle letter of 'cat' is 'a'.
'poised' with letters rearranged gives 'dipose'.
'a'+'dipose'='ADIPOSE'
(Other definitions for adipose that I've seen before include "Of animal, fat, fatty" , "Relating to fat" , "Composed of animal fat" , "Of tissue, fatty in substance" , "Is a dope fat?" .)