Female beginning to walk round island (5)
I believe the answer is:
woman
'female' is the definition.
(woman is a kind of female)
'beginning to walk round island' is the wordplay.
'beginning to' indicates taking the first letters.
'round' becomes 'o' (round can mean a round object).
'island' becomes 'man' (Man is an example).
The first letter of 'walk' is 'w'.
'w'+'o'+'man'='WOMAN'
(Other definitions for woman that I've seen before include "Mature female" , "With 1a [NEW] a freedom fighter" , "Adult female" , "With 1a [OLD], one's rather timid" , "Lady" .)