For example, a frog in Namibia mutated, acquiring pinkish extremities (9)
I believe the answer is:
amphibian
'for example a frog' is the definition.
I can't tell whether this defines the answer.
'namibia mutated acquiring pinkish extremities' is the wordplay.
'mutated' indicates anagramming the letters.
'acquiring' indicates putting letters inside.
'extremities' says to hollow out the word (remove centre letters).
'pinkish' with its centre taken out is 'ph'.
'namibia' anagrammed gives 'amibian'.
'amibian' going around 'ph' is 'AMPHIBIAN'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for amphibian that I've seen before include "Frog, toad or newt" , "Animal that lives on land and in water" , "versatile vehicle" , "Eg, newt or toad" , "Animal able to live in both land and water" .)