Member has trouble nursing sick creature (9)
I believe the answer is:
armadillo
'creature' is the definition.
(armadillo is a kind of creature)
'member has trouble nursing sick' is the wordplay.
'member' becomes 'arm' (arm is a kind of member).
'has' is a charade indicator (letters next to each other).
'trouble' becomes 'ado' (I've seen this before).
'nursing' indicates putting letters inside.
'sick' becomes 'ill' (synonyms).
'ado' placed around 'ill' is 'adillo'.
'arm'+'adillo'='ARMADILLO'
(Other definitions for armadillo that I've seen before include "Compete against, drama" , "armour-plated type" , "protected species" , "Scaly mammal" , "animal on the loose!" .)