Thanks, and perfectly legitimate of course. My bad for assuming it was an error, apologies.
CHANTEUSE (tunes each*)
+++++
Soldier loses head on the way in (5)
Entry (sentry - s)
++++
First attempt a failure? Read a gritty yarn (3,3,5)
TRY TRY AGAIN (anagram)
Trainee profit broadcast on the web. (8)
INTERNET (intern + net)
+++++
In the right context, urea has a certain feel.(7)
TEXTURE (hidden)
+++++
The half-reliable treasure hunter asked “Have you heard where they keep the saint’s toe bone”?(9)
RELIQUARY (relic + quarry)?
Actually RELI (half-reliable), QUARY (query + heard). Your puzzle Oly.
Stench may upset sailors. (9)
YACHTSMEN (anagram)
Tiny fish wait, supposedly after last period. (9)
type of tiny fish + synonym for wait = a word that sounds like term for “after last period”
Gonna go with MENOPAUSE (minnow+pause).
++++
The American fuel complex is very practical.(6)
USEFUL (US + fuel)
+++++
Line the first nest with fabric (5)
USEFUL (US + fuel)
The Eagle sang about your facial feature, something I endorse vociferously! (7)
LINEN (line + the first letter of nest)
Haven’t got this one, so will leave it open for others.
LIONIZE (Lyin’ eyes)
+++++
Playing off either LINEN or LIONIZE:
Increase the size of General Assembly. (7)
ENLARGE (general anagram)
++++
The nation is great, in an obscure way (9)
ARGENTINA (anagram)
Reverse boycott is company for cookie maker. (6)
6 or 7? Just checking 
Good catch. It is 7.
NABISCO (BAN backwards + IS + CO)
+++++
Animals tore its eye out (6)