Flying V possibly available at last in Peel (5)
I believe the answer is:
skein
'flying v' is the definition.
(I've seen this in another clue)
'available at last in peel' is the wordplay.
'available at last' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'peel' becomes 'skin' (synonyms).
'e' going into 'skin' is 'SKEIN'.
'possibly' is the link.
Can you help me to learn more?
(Other definitions for skein that I've seen before include "Flight of birds" , "Coiled length of yarn" , "Loosely coiled length of thread" , "Birds flying" , "Flock of flying geese" .)