Singer, one with piano in place of orchestra (5)
I believe the answer is:
pipit
'singer' is the definition.
(pipit is a kind of birdanimal)
'one with piano in place of orchestra' is the wordplay.
'one with' becomes 'i' (I've seen this in other clues).
'piano' becomes 'p'.
'in' indicates putting letters inside.
'place of orchestra' becomes 'pit'.
'i'+'p'='ip'
'ip' inserted within 'pit' is 'PIPIT'.
(Other definitions for pipit that I've seen before include "Meadowland bird" , "Ground-dwelling songbird" , "Small bird of rock or meadow" , "Titlark" , "Lark-like bird" .)