| Impetus behind bragging |
EGO |
| iPhone platform |
IOS |
| Italian pressed sandwich |
PANINI |
| Kama ___ |
SUTRA |
| Lex of 'Superman' |
LUTHOR |
| Like variables that are not directly observed |
LATENT |
| Make harmonious |
ATTUNE |
| Mall Santa, e.g |
TEMP |
| Mediterranean fruit |
DATE |
| Multitasker's browserful |
TABS |
| One of the Three Musketeers |
ARAMIS |
| Openly gay |
OUT |
| Opposite of SSW |
NNE |
| Pantyhose annoyance |
SNAG |
| Puts in the overhead bin, say |
STOWS |
| Reddit Q&A session |
AMA |
| Said aloud |
ORAL |
| Salted part of a margarita glass |
RIM |
| See 17-Across ... or a hint to 23-, 34- and 48-Across |
BREAKTHINGS |
| Shoe part that may develop holes |
SOLE |
| Shows explosive anger |
RAGES |
| Sorry sort |
ATONER |
| Supped |
ATE |
| Swiss currency |
FRANC |
| Tend to, as taxes or fingernails |
FILE |
| Thanksgiving mo |
NOV |
| Tolkien tree creature |
ENT |
| TV political drama known for its 'walk and talks' |
THEWESTWING |
| Typical high schooler |
TEEN |
| Warmth |
HEAT |
| What a budget motel might have |
ONESTAR |
| With 55-Across, modern principle of start-ups |
MOVEFASTAND |
| Wolf (down) |
SNARF |
| ___ Stone (British Museum attraction) |
ROSETTA |
| ___ the Riveter, W.W. II icon |
ROSIE |
| ___ Thermopolis, Anne Hathaway's role in 'The Princess Diaries' |
MIA |
| ___-bitsy |
ITSY |