Wad of material in confines of sleeve? One contributes to suit (5)
I believe the answer is:
spade
'one contributes to suit' is the definition.
(one card from the playing card suit spades)
'wad of material in confines of sleeve?' is the wordplay.
'wad of material' becomes 'pad' (as in a pad of paper).
'in' is an insertion indicator.
'confines of' says to hollow out the word (remove centre letters) (the letters at the borders or confines are used).
'sleeve' with its middle taken out is 'se'.
'pad' going inside 'se' is 'SPADE'.
(Other definitions for spade that I've seen before include "Digging implement" , "black suit" , "Gardening tool (maybe so called)" , "Jack or one of a dozen others" , "Tool; playing card" .)