Rubbish celebrity almost pocketing loads (7)
I believe the answer is:
flotsam
'rubbish' is the definition.
(thesaurus)
'celebrity almost pocketing loads' is the wordplay.
'celebrity almost' becomes 'fam' (I can't explain this - if you can you should believe this answer much more).
'pocketing' is an insertion indicator.
'loads' becomes 'lots' ('lots' can be a synonym of 'loads').
'fam' enclosing 'lots' is 'FLOTSAM'.
Can you help me to learn more?
(Other definitions for flotsam that I've seen before include "Things found floating from a ship" , "Vagrants" , "The floating wreckage of a ship" , "Wreckage adrift at sea" , "Detritus" .)