Work without reading weight of cloth (7)
I believe the answer is:
grogram
'cloth' is the definition.
(grogram is a kind of cloth)
'work without reading weight' is the wordplay.
'work' becomes 'go' (synonyms).
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'reading' becomes 'r' (one of the traditional three R's of education).
'weight' becomes 'gram' (unit of weight).
'go' placed around 'r' is 'gro'.
'gro'+'gram'='GROGRAM'
'of' acts as a link.
(Other definitions for grogram that I've seen before include "Coarse material" , "fabric" , "Stuff that!" .)