Following scrap, you say your leader is fit for heavy lifting? (6)
I believe the answer is:
mighty
'fit for heavy lifting?' is the definition.
'following scrap you say your leader' is the wordplay.
'following' means one lot of letters go next to another.
'scrap' becomes 'mite'.
'you say' indicates a 'sounds like' (homophone) clue.
'leader' indicates taking the first letters.
The initial letter of 'your' is 'y'.
'mite' sounds like 'might'.
'might' next to 'y' is 'MIGHTY'.
'is' acts as a link.
(Other definitions for mighty that I've seen before include "Powerful - huge" , "Very powerful/strong" , "Powerful - exalted" , "Having great strength" , "Large" .)