The most common and most likely answer to this crossword clue is the 5 letter word PIPIT
I've seen this crossword clue in The Times
P
I
P
I
T
More clues leading to the result PIPIT
- Little bird: spot it?
- It holds up seed for a songbird
- Songbird — it goes after seed
- Seed attracts Italian songbird
- Singer's held up gratuity — smallest amount possible?
- Apparently good place for orchestra and singer
- Songbird Greek character buried in mine
- Seed, just the thing for bird
- Seed diet oddly not for songbird
- Narrowly defeat Italian for a lark
Buddy explains!

The straight part
We know that "singer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case singer = pipit.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PIPIT mean?
PIPIT noun- Any of various small passerine birds, mainly from the genus Anthus, that are often drab, ground feeding insectivores of open country.