Strange having chaps on time for scrap (7)
I believe the answer is:
oddment
'for scrap' is the definition.
(synonyms)
'strange having chaps on time' is the wordplay.
'strange' becomes 'odd' (I've seen this in another clue).
'having' means one lot of letters go next to another.
'chaps' becomes 'men' (chap can mean a man).
'on' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'odd'+'men'+'t'='ODDMENT'
(Other definitions for oddment that I've seen before include "Just a bit left" , "An isolated article, something left over" , "Piece left over, no match" , "a bit spare" , "Remnant" .)