Across
Old novel certainly not returned (6)
Dog brought over eccentric's glasses (8)
I haven't cracked this one yet — but Fifteensquared have:
LAB ( LAB rador dog) reversed (brought over) + LOON’S (belonging to a simple-minded or eccentric person)
Funny shorts for fellow radio presenter are wrong style essentially (11)
M Cloudy u (3)
One hears special 12A half of it Art (7)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (special) DUO (entry at 12 across) and I ( one of the two [half] letters in It) and ART
Somewhere They Can't Find Me c (7)
Hunter taking two fewer shots than expected (5)
I haven't cracked this one yet — but Fifteensquared have:
EAGLE (in golf, a score of two under par [two fewer shots than expected] is referred to as an eagle) double definition
C Homeward Bound r (3)
I haven't cracked this one yet — but Fifteensquared have:
MEW contained in (bound) ho MEW ard
' America s (5)
I haven't cracked this one yet — but Fifteensquared have:
YANKS (informal term for American people [folk]) double definition
A I Am A Rock c (7)
I haven't cracked this one yet — but Fifteensquared have:
( DON [an academic] containing [tackles] [ I AM ]) + D (daughter)
Friends wanting third almost group of three great musicians (7)
Anyone hearing sheep? (3)
Simon not in a revised list of possible award winners (11)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (revised) SIMON NOT IN A
Parsley Sage Rosemary & Thyme d (8)
Musicians' smooth act now intermittently on stage (6)
Down
Someone playing Bridge Over Troubled Water interrupted by loud app? (8)
I haven't cracked this one yet — but Fifteensquared have:
( S [South; designation of someone playing the card game Bridge]) + O [over] + an anagram of [troubled] WATER ) containing (interrupted by) F (forte; loud)
Marines in trench coming up given a wave (6)
I haven't cracked this one yet — but Fifteensquared have:
RM (Royal Marines) contained in (in) DEEP (term denoting a trench in the ocean, such as the Marianas Trench in the Pacific) reversed (coming up; down entry)
Make Art in Rose of Aberdeen perhaps whoop it up (15)
Fibrous structure of super grains releasing energy (6)
S The Boxer u (15)
Paul Simon's like terribly bald and bony (8)
Say greatly amplifying [The Sound of Silence] abroad (5)
Task getting bottom off strange drinking bowl (5)
Mark regularly argued at parties (8)
Mrs Robinson p (5)
Careless kissers stop in case of STD (8)
I haven't cracked this one yet — but Fifteensquared have:
( LIPS (kissers) + HO [instruction to a horse to stop]) contained in (in) SD (outer letters of [case of] S t D )
Q Feelin' Groovy u (5)
Releases covers of Bookends after trial recording? (6)
H A Most Peculiar Man u (6)
I haven't cracked this one yet — but Fifteensquared have:
H (husband) contained in (entertained by) an anagram of (peculiar) A MOST
Type letters or click words in the clue