Doctor Who overwhelmed by support of American singer (6)
I believe the answer is:
towhee
'american singer' is the definition.
'towhee' can be an answer for 'singer' (towhee is a kind of birdanimal). I am not certain of the 'american' bit.
'doctor who overwhelmed by support' is the wordplay.
'doctor' is an anagram indicator.
'overwhelmed by' indicates putting letters inside (inserted letters get absorbed or overwhelmed).
'support' becomes 'tee' (tee is a kind of support).
'who' is an anagram of 'owh'.
'owh' placed into 'tee' is 'TOWHEE'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for towhee that I've seen before include "winger" , "N American bird" .)