Strongman almost pulverised small unit (8)
I believe the answer is:
angstrom
'small unit' is the definition.
'angstrom' can be an answer for 'unit' (angstrom unit is a kind of unit). I'm unsure of the 'small' bit.
'strongman almost pulverised' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'pulverised' is an anagram indicator.
'strongman' with its final letter taken off is 'strongma'.
'strongma' with letters rearranged gives 'ANGSTROM'.
Can you help me to learn more?
(Other definitions for angstrom that I've seen before include "Swedish scientist" , "A small measure" , "Microscopic length unit" , "Tiny unit of length used in Physics" , "Wavelength produced" .)