Avoid team on stair (8)
I believe the answer is:
sidestep
'avoid' is the definition.
(I know that sidestep is a more specific form of avoid)
'team on stair' is the wordplay.
'team' becomes 'side' (both can mean a sports team).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'stair' becomes 'step' (synonyms).
'side'+'step'='SIDESTEP'
(Other definitions for sidestep that I've seen before include "Dodge (an issue?)" , "Dodge - circumvent" , "Shift to right or left" , "To avoid" , "Find a way round" .)