Tubers Teddy’s given to deer (6)
I believe the answer is:
eddoes
'tubers' is the definition.
(eddoe is a type of root vegetable)
'teddy's given to deer' is the wordplay.
'teddy' becomes 'ed' (I've seen this in other clues).
'given to' is a charade indicator (letters next to each other).
'deer' becomes 'does' (I've seen this before).
'ed'+'does'='EDDOES'
(Other definitions for eddoes that I've seen before include "Starchy things" , "roots" , "exotic vegetables" , "Edible plants" .)