Member has difficulty restraining sick animal (9)
I believe the answer is:
armadillo
'animal' is the definition.
(armadillo is a kind of animal)
'member has difficulty restraining sick' is the wordplay.
'member has' becomes 'arm' (I can't explain this - if you can you should believe this answer much more).
'difficulty' becomes 'ado' (I've seen this in another clue).
'restraining' means one lot of letters goes inside another.
'sick' becomes 'ill' (similar in meaning).
'ado' going around 'ill' is 'adillo'.
'arm'+'adillo'='ARMADILLO'
Can you help me to learn more?
(Other definitions for armadillo that I've seen before include "Burrowing mammal with a covering of bony plates" , "armour-plated type" , "Plated burrowing animal" , "American insect-eater" , "Molar laid out for the horny-plated animal" .)