Snake regularly hiding in baobab (3)
I believe the answer is:
boa
'snake' is the definition.
(I know that boa is a type of constrictor)
'regularly hiding in baobab' is the wordplay.
'regularly hiding in' means one should take alternating letters.
The alternating letters of 'baobab' are 'BOA'.
(Other definitions for boa that I've seen before include "One covered in scales" , "Large constricting snake" , "One with scaly body" , "One who puts the squeeze on" , "Long, thin, feathery scarf" .)