11 across
Withdraw
sheath
for
contraceptive
during
enjoyable
time
to
get
pregnant
(9)
Withdraw sheath for contraceptive during enjoyable time to get pregnant (9)
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The definition is at the end of the clue.
How the clue works
The answer get pregnant means to fertilise. Take FUN DATE for 'enjoyable time', then the outer letters (the sheath) of 'contraceptive' give CE, which is withdrawn (reversed) to EC and tucked inside after the F, giving F, EC and UNDATE run together as FECUNDATE.