Tyre oddly having sufficient tread (7)
I believe the answer is:
trample
'tread' is the definition.
('trample' can be a synonym of 'tread')
'tyre oddly having sufficient' is the wordplay.
'oddly' indicates alternate letters.
'having' says to put letters next to each other.
'sufficient' becomes 'ample' ('ample' is associated in meaning with 'sufficient').
The alternating letters of 'tyre' are 'tr'.
'tr'+'ample'='TRAMPLE'
(Other definitions for trample that I've seen before include "Tread on something roughly" , "squash" , "Tread on, crush" , "Tread heavily" , "Crush by treading" .)