Belly-dancing mum's in Turkey on vacation (5)
I believe the answer is:
tummy
'belly' is the definition.
(I know that tummy is a type of belly)
'dancing mum's in turkey on vacation' is the wordplay.
'dancing' is an anagram indicator.
'in' is an insertion indicator.
'on vacation' says to hollow out the word (remove centre letters).
'turkey' with its centre removed is 'ty'.
'mum' with letters rearranged gives 'umm'.
'umm' inserted inside 'ty' is 'TUMMY'.
(Other definitions for tummy that I've seen before include "Belly" , "Stomach (informal)" , "Stomach (colloq.)" , "Stomach, abdomen" , "middle" .)