Go, for example, outside of the cell (6)
I believe the answer is:
gamete
'cell' is the definition.
(gamete is a kind of cell)
'go for example outside of the' is the wordplay.
'go for example' becomes 'game' (go is a kind of game).
'outside of' says to hollow out the word (remove centre letters).
'the' with its middle taken out is 'te'.
'game'+'te'='GAMETE'
(Other definitions for gamete that I've seen before include "Reproductive unit" , "Egg-cell" , "Cell which unites with another in reproduction to form a zygote" , "Male or female germ cell" , "Reproductive cell" .)