Push roughly with large tool (6)
I believe the answer is:
shovel
'tool' is the definition.
(I know that shovel is a type of tool)
'push roughly with large' is the wordplay.
'push roughly' becomes 'shove' (synonyms).
'with' is a charade indicator (letters next to each other).
'large' becomes 'L' (eg in clothes sizes).
'shove'+'l'='SHOVEL'
(Other definitions for shovel that I've seen before include "Scoop for lifting and carrying" , "Spade with upturned sides" , "Scooper" , "Old clerical hat" , "Tool for snow, coal, etc" .)